12-26-2011, 04:46 PM
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Originally Posted by happyfeet
thanks for the advice have looked at CarribSea. They sell aragonite sands for marine tanks, would this be suitable for my freshwater tank? not really sure what a marine tank is? anyway would i put some sand in a mesh like sock and just put it in the top of my filter? Have read it makes water cloudy to strat with should it be washed first, what did you do as your problem is very similar, dont really want cloudy water...merry xmas by the way
Thanks, and Merry Christmas and season's greetings to you.
The CarribSea sand is fine, I have the Crushed Coral with aragonite blend. I put a small amount, about half a cup I think, in a nylon mesh bag in the top of the canister filter. Rinse it well. It will cloud the water a tad but that soon settles out in the filter.
Marine tanks are saltwater. The substrate is normally a sand mix that contains calcareous substances (crushed coral, aragonite, marble, dolomite, linestone...) since the hardness and pH must be high for marine fish. These substrates can work in some freshwater tanks, such as rift lake cichlids which also need hard and basic water. But aside from this, not a good freshwater substrate as it will harden the water too much. Even a small amount like I use adds 2-3 dGH and raises the pH significantly in my 115g tank.