Average Reviews:
(More customer reviews)I used this stuff to replace some crushed shell substrate in an mbuna tank. I love the look but, for me at least, it didn't live up to its billing. It had no buffering effect in my tank. My tap water is 7.2-7.4 and, after several days, the new substrate had no effect. So it didn't replace buffering chemicals. Second, the bag says no rinsing required. That may be, but there is a lot of sediment that will take a few days and a couple of water change to work out.
I have also noticed that my water is slightly more cloudy after replacing my old substrate with the Carib Sea. However, that may be due to fact that the old substrate had mature bacteria colonies and the new does not. Even though I have extensive biological filtration with a fluidized bed filter, it may take a while for the new substrate to catch up.
One other note: with sand like this, fish waste tends to accumulate on top of the substrate rather than sinking as it would with gravel. The bad news is that because this product is so light in color, that looks bad. The good news is that it is easy to remove with a battery vacuum. Vacuuming every day or two probably contributes to better water quality than does cleaning the gravel every week or two during water changes.
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