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expired Posted by Phantom240 • Jun 3, 2021
expired Posted by Phantom240 • Jun 3, 2021

15.4 lbs Seachem Flourite Black Aquarium Sand

$21

$30

30% off
Amazon
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Deal Details
Amazon has 15.4 lbs Seachem Flourite Black Aquarium Sand on sale for $21.32. Shipping is free w/ Prime or on $25+ orders.

Thanks to Community Member Phantom240 for posting this deal.

Features:
  • Flourite Black Sand is a specially fracted stable porous clay gravel for the natural planted aquarium.
  • Its appearance is best suited to planted aquaria, but may be used in any freshwater aquarium environment.
  • Most effective when used alone as an integral substrate bed, but it may be mixed with other gravels. Gravel modifiers such as laterite are not necessary.
  • Flourite Black Sand is not chemically coated or treated and will not alter the pH of the water.
  • Flourite Black Sand is good for the life of the aquarium and need not be replaced.
  • Although it is pre-washed, because Flourite Black Sand is a natural product, it may become dusty in transit and require rinsing before use to remove any residual dust.

Editor's Notes

Written by SubZero5 | Staff
  • About this Deal:
    • Rated 4.5 out of 5 stars from 750+ reviews.
    • At the time of this posting, Our research indicates that this is $4.81 lower (18.4% savings) than the next best available prices for similar products with prices starting from $26.13. -SaltyOne
  • About this Store:

Original Post

Written by Phantom240
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has 15.4 lbs Seachem Flourite Black Aquarium Sand on sale for $21.32. Shipping is free w/ Prime or on $25+ orders.

Thanks to Community Member Phantom240 for posting this deal.

Features:
  • Flourite Black Sand is a specially fracted stable porous clay gravel for the natural planted aquarium.
  • Its appearance is best suited to planted aquaria, but may be used in any freshwater aquarium environment.
  • Most effective when used alone as an integral substrate bed, but it may be mixed with other gravels. Gravel modifiers such as laterite are not necessary.
  • Flourite Black Sand is not chemically coated or treated and will not alter the pH of the water.
  • Flourite Black Sand is good for the life of the aquarium and need not be replaced.
  • Although it is pre-washed, because Flourite Black Sand is a natural product, it may become dusty in transit and require rinsing before use to remove any residual dust.

Editor's Notes

Written by SubZero5 | Staff
  • About this Deal:
    • Rated 4.5 out of 5 stars from 750+ reviews.
    • At the time of this posting, Our research indicates that this is $4.81 lower (18.4% savings) than the next best available prices for similar products with prices starting from $26.13. -SaltyOne
  • About this Store:

Original Post

Written by Phantom240

Community Voting

Deal Score
+37
Good Deal
Visit Amazon

Price Intelligence

Model: Flourite Black Sand, 15.4 Pound (Pack of 1)

Current Prices

Sort: Lowest to Highest | Last Updated 7/3/2025, 12:51 AM
Sold By Sale Price
Amazon$37.58

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Top Comments

sillyrib
1555 Posts
478 Reputation
Something seriously wrong with you
gonehometodallas
1122 Posts
89 Reputation
I'm just happy to see aquatic items here on SD. More more more, Thumbs up if you agree !!
DangerQuail
352 Posts
166 Reputation
Dealing with the same issue, I had 6 "marimo balls" in there and each month I pulled out about a quart sized ball.
I'm convinced they're selling fake marimos online that's why they create tons of hair algae in your tank. I kept them for so long because my corydoras and shrimp love them. But I have recently gotten rid of all of them now.

62 Comments

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Jun 4, 2021
386 Posts
Joined Aug 2018
Jun 4, 2021
diadilus
Jun 4, 2021
386 Posts
Is this a good substrate for a RES turtle tank?
Original Poster
Jun 4, 2021
15 Posts
Joined Sep 2018
Jun 4, 2021
Phantom240
Original Poster
Jun 4, 2021
15 Posts
I don't see why it wouldn't be. It's fine enough that detritus should mostly just accumulate on the surface and make it easier to clean than something coarse like pea gravel
1
Jun 5, 2021
278 Posts
Joined Dec 2014
Jun 5, 2021
ogger151
Jun 5, 2021
278 Posts
Quote from diadilus :
Is this a good substrate for a RES turtle tank?
It's good sand for planted aquarium. It's real sand some at the pet store some are coated or painted. I use it and the gravel in all my aquariums. Wash thourally in small quantities. From shipping you get dust so rinse good.
Jun 5, 2021
6 Posts
Joined Mar 2019
Jun 5, 2021
MichaelR3211
Jun 5, 2021
6 Posts
Quote from diadilus :
Is this a good substrate for a RES turtle tank?
I wouldn't use substrate for a RES. They eat everything and sand can cause impaction.
1
Jun 5, 2021
324 Posts
Joined Oct 2014
Jun 5, 2021
oogoom
Jun 5, 2021
324 Posts

Our community has rated this post as helpful. If you agree, why not thank oogoom

Quote from Phantom240 :
I don't see why it wouldn't be. It's fine enough that detritus should mostly just accumulate on the surface and make it easier to clean than something coarse like pea gravel
actually it would get kicked up and buried, decompose and release noxious gases every time it gets disturbed. it also makes the water cloudy every time it gets disturbed and RES will do this often. RES are best with larger rocks they can't move or eat with a clean bottom allowing the filtration to do its best job and keeping the water clean.

1
Jun 5, 2021
8,790 Posts
Joined Dec 2014

This comment has been rated as unhelpful by Slickdeals users.

Jun 5, 2021
1,555 Posts
Joined Dec 2010
Jun 5, 2021
sillyrib
Jun 5, 2021
1,555 Posts
Quote from LEOMHK1.0 :
This product is easy to use
This product adds a great Value (OK..but they don't actually state what the value is...??)
This product is Manufactured in United States


(Everything about the product description sounds like it's a Chinese product. It's one step from: This Number One A+ Product)
Something seriously wrong with youMad
2

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Jun 5, 2021
103 Posts
Joined Sep 2015
Jun 5, 2021
raithed
Jun 5, 2021
103 Posts
I always see the substrate on sale on Amazon, have not seen the sand yet.
Jun 5, 2021
8 Posts
Joined Feb 2016
Jun 5, 2021
Kryllium
Jun 5, 2021
8 Posts
I use this. Be sure to rinse it before adding it to the tank. Makes the water very cloudy.
Jun 5, 2021
352 Posts
Joined Nov 2017
Jun 5, 2021
DangerQuail
Jun 5, 2021
352 Posts
I personally like their fluorite black substrate way better. Sand is such a pain in the butt substrate to use. Plants can easily root in fluorite black and sand can get compacted easily.

Additionally the chips in the non sand substrate allow for oxygen and gasses to be exchanged which prevents anaerobic decomp from occurring in your substrate that could bring diatoms or worse, dead fish.

Any aquarium product you buy should be tailored to your lifestyle and the design of the tank.

I hate gravel vacuuming and any care in general so I buy the larger fluorite substrate, have tons(thousands) of Malaysian trumpet snails, and a heavily planted tank.
I'm also running tons of air into the tank and the water is circulated completely every minute or so via chemical and biological filtration. I do not use any mechanical filtration outside of prefilters and sponge filters which are more biological than mechanical imo. Gotta keep the snails from killing my canister filter.

I do water changes once a month and clean the filter every 90 days. Other than that they only get food. If one of the fish die the snails will remove it in under a day anyway.
Last edited by DangerQuail June 5, 2021 at 02:14 PM.
Jun 5, 2021
349 Posts
Joined Apr 2009
Jun 5, 2021
intex45
Jun 5, 2021
349 Posts
Quote from DangerQuail :
I personally like their fluorite black substrate way better. Sand is such a pain in the butt substrate to use. Plants can easily root in fluorite black and sand can get compacted easily.

Additionally the chips in the non sand substrate allow for oxygen and gasses to be exchanged which prevents anaerobic decomp from occurring in your substrate that could bring diatoms or worse, dead fish.

Any aquarium product you buy should be tailored to your lifestyle and the design of the tank.

I hate gravel vacuuming and any care in general so I buy the larger fluorite substrate, have tons(thousands) of Malaysian trumpet snails, and a heavily planted tank.
I'm also running tons of air into the tank and the water is circulated completely every minute or so via chemical and biological filtration. I do not use any mechanical filtration outside of prefilters and sponge filters which are more biological than mechanical imo. Gotta keep the snails from killing my canister filter.

I do water changes once a month and clean the filter every 90 days. Other than that they only get food. If one of the fish die the snails will remove it in under a day anyway.
Ditto on the flourite, I used it on my small 20 g and a lot less maintenance than the 75 gallon planted tank I have with caribsea eco-complete that somehow managed to spread the marimo ball I had in there. The floor and plants are covered in that thick green stuff and is impossible to remove.
Jun 5, 2021
681 Posts
Joined Nov 2012
Jun 5, 2021
Dayzzz
Jun 5, 2021
681 Posts
Read the reviews before ordering. this sand substrate takes a long while to clean. Not everyone is willing to spend an hour cleaning substrate. If you like black substrate, another good option is to try eco complete, it's more of a rocky gravel, made of volcanic rock, that doesn't need any rinsing.
Jun 5, 2021
352 Posts
Joined Nov 2017
Jun 5, 2021
DangerQuail
Jun 5, 2021
352 Posts
Quote from intex45 :
Ditto on the flourite, I used it on my small 20 g and a lot less maintenance than the 75 gallon planted tank I have with caribsea eco-complete that somehow managed to spread the marimo ball I had in there. The floor and plants are covered in that thick green stuff and is impossible to remove.
Dealing with the same issue, I had 6 "marimo balls" in there and each month I pulled out about a quart sized ball.
I'm convinced they're selling fake marimos online that's why they create tons of hair algae in your tank. I kept them for so long because my corydoras and shrimp love them. But I have recently gotten rid of all of them now.
Jun 5, 2021
349 Posts
Joined Apr 2009
Jun 5, 2021
intex45
Jun 5, 2021
349 Posts
Quote from DangerQuail :
Dealing with the same issue, I had 6 "marimo balls" in there and each month I pulled out about a quart sized ball.
I'm convinced they're selling fake marimos online that's why they create tons of hair algae in your tank. I kept them for so long because my corydoras and shrimp love them. But I have recently gotten rid of all of them now.
I think the only way to completely remove them is to start over. Some of it even managed to sneak in a jungle val I was transferring out of the tank. All ideas I see online would end up killing all the other plants, ramshorns, and RCS I have in there as well so I'm struck.

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Jun 5, 2021
352 Posts
Joined Nov 2017
Jun 5, 2021
DangerQuail
Jun 5, 2021
352 Posts
Quote from Dayzzz :
Read the reviews before ordering. this sand substrate takes a long while to clean. Not everyone is willing to spend an hour cleaning substrate. If you like black substrate, another good option is to try eco complete, it's more of a rocky gravel, made of volcanic rock, that doesn't need any rinsing.
This sand is preferred by most due it not changing water chemistry and not being sharp like lava rock which can damage catfish.

The key to cleaning this substrate is put it in a bucket. Hose buried in the substrate and turn the hose on enough so that it agitates but not enough to kick up the desired material out of the bucket. Flood the bucket for 15 minutes+. Then take the hose and run it through the rest of the substrate and keep doing that until it runs clear.

People try to rush the cleaning process which to me is strange. You do this once or twice a decade unless you move. I can't understand how a 20 minute process is unreasonable. Especially since fish keeping is an extremely time consuming hobby unless you spend a lot.

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