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Originally Posted by copper08
is it ok to feed them lettuce, and do they need filtration or can they breathe from the surface? thanks!
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Definitely feed a variety of dark leafy greens. The snails need them for the calcium. Also consider adding a calcium supplement to the tank for their shells. You can either buy a version of this for snails and crustatians (expensive) or go to Boots or whatever your local equivalent is and simply buy calcium tablets that are intended for humans (not expensive). As long as it's just calcium that's in them you're alright.
7.5 is a good ph to maintain for the snails, much lower and their shells would start to deteriorate. The bettas will certainly cope with this increase in ph (just do it gradually) which you can do by adding crushed coral to the subtrate of filter. Maybe you don't need to bother, my water is very soft so it's a must for me, but I find many folk here have much harder water.