Eco-Friendly Bio-Block Stones for Aquariums

Kindle CustomerKindle Customer: This thing was a total waste of money. It got my hopes up. It was a last ditch effort before totally breaking down the tank. However, it didn’t work. It spooked the fish at first. Then they decided to eat the white stuff that grows on the block. I guess that’s ok. I hope it works for other people, but it didn’t work for me.

United States on Aug 24, 2023

MarijaMarija: Guys, this cube is fish tank life hack!!!
My almost dying cloudy water fishtank went to crystal clear angelfish home for babies in just 3months! It was so calming to see the whole fish tank heal and be healthy to the point they decide to have babies. The water is always clear and my fish tank stats never change even in a month! This makes my fishtank maintenance come from chore to relaxing once a while thing! This is incredible and so easy to use, just wash it off and leave overnight, place it in and sit back and relax! Totally recommend! Wow!

United States on Aug 06, 2023

ymya: I've used this in both my larger cold-water tank (30 gallons) and in my 10- and 6-gallon tanks. These are great at maintaining water clarity, reducing ammonia, and helping keep the tank inhabitants happy. Yes, they are kind of ugly, so I hide them behind foliage in my planted tanks. And yes, you will still need to properly cycle and maintain your tank water quality. Overall, though, I find they do a really nice job of reducing the frequency of water changes and keeping the tank water crystal clear.

These are particularly good at clearing up cloudy water in planted tanks with substrate, and I've used them extensively that way to strong effect.

United States on Mar 20, 2023

biochemkris: I use this in a 55 gallon aquarium with goldfish and snails. After soaking the stone, then placing it in the aquarium, it takes a few days to see a difference in the water, but it works. It also seems to provide calcium for the snails as I found a noticeable difference for the better in shell quality after adding this to my tank. Yes, there is some residue that appeared on my glass after the rock was placed in the tank, but I was able to wipe that away and it did not return. The rock is also extremely large, not very attractive, and difficult to hide in my aquascaping. Due to the size of my tank, they recommend having two of these in my tank, but that just won’t work with my set up (it would take up too much space and be an eye sore). The packaging says these last 1-2 years, but I found one in my 55 gallon tank lasted about 5 months. So, I give it 4 stars because it works and the benefits are worth having one in the tank, but it’s ugly and oversized.

United States on Oct 30, 2022

RG: Have Geophagus cichlids for years and even raised their babies but always hard to maintain water and waste. Seems to always lose 1 8months to yr with Popeye and I have 2 large enheim filters each 50gal capable and I only have a 55 gal tank and water change and maintain clean tank.. They eat hardy and release waste just as much..

So that was overview and now have another large male with popeye again building past 2 weeks so attacked with new substrate (3 different levels) water changed, new filter pads and continued to get worse to point he’s now hiding and just matter of days.. So I bought this rock figured worth a shot since medicine never works just waste money and stress on fish and only success with 1 over years.

I know long review but worth the understanding of environment. 2 days in with this filter rock and he’s better, eyes clearing and he’s back out vibrant. Not sure how it works but for any fish lovers this is a must bio rock and I will never have a tank without! Even other fish seem happy swimming like youngsters again. Waters been clear so don’t see a difference but underlining water quality must be perfect for them.

Just...

United States on Sep 05, 2022

Cheryl Robertson: Seems a good acccessory it’s helping keep tank clean and clear

United Kingdom on Mar 31, 2021

yw2012: Before having this magic stone, I had to change filter weekly ( filter was black and completely plugged by the end of 1 week) and water change bi-weekly. Now, the filter was clean after 1 week, and water perfectly clear by the end of 2 weeks. I have 6 good sized gold fish in each tank. thanks to this magic EcoBio-Block stone. This is THE single most efficient, and cheapest equipment for fish tank!!

Canada on Nov 23, 2019

Judith Ng: Cannot use the stone as the stone is easy to fall apart into small pieces in water and my turtle is kept biting the rock. Do not want my turtle to become sick by eating the fall apart tiny pieces.

Canada on Nov 12, 2019

chantale dambrosio: I haven’t noticed any difference for my tank so I can’t really say it helped or not

Canada on Aug 04, 2019

Lynne Irwin: It works

Canada on Jan 29, 2018