freshwater sand as a substrate
so after some thinking, I've decided I want to try sand as a substrate in my 20 gallon... mixed with some pebbles and smaller stones on top. However I have never used sand before, I remember seeing it at the pet shop, but all the bags seemed like they were for marine aquariums.. I'm sure it wasn't coral sand however. Any help on finding sand that will be safe for my fishes? I know they sell bulk reptile sand, wonder if that would work. Other than finding sand, I want to layer bottom of the tank only at the very back with normal aquarium gravel so that my larger live plants have something better to anchor too. As for the filter, I have a marineland penguin 200 bio-wheel... I think it will be okay.
Play sand is actually an excellent plant substrate for all types of plants. The only problem is that you need to keep it stirred up so it doesn't compact and cause anarobic spots or choke out the roots. Malaysian Trumpet Snails will do this for you or you can do it by hand.
As for keeping substrate seperate with sand, good luck. The sand will migrate and eventaully mix together with all the substrate on the bottom. The only way I can think of would be to have a divider in there.
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