ACTIV-FLORA Planted Aquarium Substrate, Lake Gems, 20-lb bag -

Activ-Flora Planted Aquarium Substrate, 20-lb bag

By Activ-Flora
Rated 4.0678 out of 5 stars
Color: Lake Gems

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$24.99Chewy Price

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This Item - Activ-Flora Planted Aquarium Substrate, Lake Gems, 20-lb bag
Rated 4.0678 out of 5 stars
$24.99Chewy Price

Spend $50, Get $15 eGift Card

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About This Item


  • Bio-Activ, nutrient-enriched gravel contains a wide variety of essential minerals including phosphorous, magnesium, potassium, copper, zinc and many more.
  • Helps aquatic plants thrive and quickly achieve optimum growth; also contains iron, so you won’t need to add laterite.
  • Micronutrients are slow-released over time, making Activ-Flora substrate indefinitely self-sustainable.
  • Live heterotrophic bacteria provides instant nitrogen cycling without altering your pH.
  • 100% natural with no artificial dyes or additives; grain size of the lake gems color blend is 3.1-6.3 mm.

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Play Video: Learn More About Activ-Flora From Our Team of Experts
Learn More About Activ-Flora From Our Team of Experts

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Fish TypeGoldfish, Koi & Pond FishGoldfish, Koi & Pond FishGoldfish, Koi & Pond FishGoldfish, Koi & Pond FishGoldfish, Koi & Pond Fish
Aquarium TypePondPondPondPondPond

Questions & Answers

31 Customer Questions

Do we ever have to replace the substrate?
Answer by ChewyAug 21, 2018
Activ-Flora will last for the life of your aquarium and it's not recommended to clean the substrate. If you agitate the surface the loose particulars will begin to float and your filter system will remove it.

Is it okay for my betta to be in the water while it's all cloudy from the new substrate?
Answer by ChewyAug 09, 2018
It's recommended to add your fish back to the tank after the substrate settles.

Did I pre-wash the subrate?
Answer by ChewyMar 28, 2018
This product is pre-washed by a nutri-stabilizing process to preserve abundant trace elements and reduce cloudiness when introduced to an aquarium however, you can rinse it if you'd like.

Is this acceptable for a pleco or algae eater?
Answer by ChewyAug 16, 2018
This product is safe for both marine and freshwater fish.

ReviewsWrite a Review

Rated 4.0678 out of 5 stars
59 Reviews
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59 Customer Reviews

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Rated 5 out of 5 stars
By Xanadu on Dec 14, 2022

Chewy just gets it done right the first time

I ordered 3 bags of aquarium substrate here. I also ordered 3 bags of substrate from a big-box competitor who had a buy-2/get 1 free promo. Well, the Chewy box arrived with no hassles or delays. The big-box store order...only half of it arrived. Boxes were wet and torn to shreds. Have spent too much time on the phone with them trying to sort of what happened, where the rest of my order is, and how to replace it...a wasted week with them, whereas Chewy just takes care of their business and everything works. THAT's HUGE.... Thank you, thank you, thank you!

Rated 5 out of 5 stars
By Katie on Nov 19, 2022

In depth review

No cloudiness, no rinse needed, deep black, heavy weight, finer than basic gravel but bigger than coarse sand. plants live this and so do I now! 20 lbs bag substrate is comparative to a 10 lb bag of sugar for eye measurer. I mixed with caribsea eco complete(that's cloudy and messy, prefer this one by far!) And covered with pool filter sand. Great combo for live plant tank for nutrition,looks, and to keep cost down

Rated 2 out of 5 stars
By LisaD on Dec 3, 2022

Too coarse a grade

The gravel is a nice natural color. What I don't like is that it is very coarse with really uneven pebble sizes, some a fine grit and some as big as my thumbnail. I do not like the fine claylike sediment that becomes suspended in the water. I prefer sand to gravel. Plants do grow in it, but I have had equal luck with sand and plant tabs. It's really not attractive.

Rated 3 out of 5 stars
By jojo on Jun 26, 2022


I followed direction listed on the activ-flora. I did not rinse the gravel. There was a bit of cloudy water but was all gone in a day. My seeds seem to love it. Pictures show a 7-10 growth. My only negatives are the smell and the slim....

Rated 4 out of 5 stars
By cretccrvt on Jun 15, 2022

pretty good

So, I set up a new tank and followed the directions. My tank was still cloudy for over a week, but after a water change it was all good. My tank also cycled in 1.5 weeks, so I think this product did help speed up the cycle. And I like how it looks. All in all, a solid product.

Rated 5 out of 5 stars
By Julie on May 6, 2022


This substrate is awesome. It's a really beautiful blend of stones and colors. The bacteria in it is helping my tank to cycle quickly and I'm really happy with how things are going so far. Love this substrate

Rated 1 out of 5 stars
By Tacticalbassfisher on Jan 28, 2022

Trash dont waste your money

Two years in fish are still alive every decoration is in the same place but I cant get a single thing to grow in it well hair algae grows fine I couldn't even get floating plants to live that's with co2 and a fluval light I regret buying this trash

Rated 5 out of 5 stars
By Drigale on Dec 21, 2021

So far so good

So far so good. Followed the instructions for the most part. Though I did it a little backwards, then let the filter do its thing for a day, and it's beautiful. The plants look great too. Will keep an eye on it and edit if need be. Just gotta let the sediments settle and/or filter out

Rated 5 out of 5 stars
By Andrea on Dec 10, 2021

Nice substrate

Beautiful substrate for my 29 gallon, i ordered 2 bags. Water did cloud some but was clear after 24 hours, do not rinse this stuff or you loose all the nutrients for your plants. Gives a natural look and not dark colored, also the rock is mostly rounded and smooth as well

Rated 4 out of 5 stars
By Moonshine on Dec 16, 2021

Good bio-active substrate

Settles fairly quickly after addition of water and live plants. Water is still tinted slightly but it’s not a problem. My plants are growing well and my Betta fish is happy.