hi guys, i'm trying set up an apisto tank using oak leaves as part of their habitat, the only problem is i'm not real familiar with the different species of oak since it doesn't grow here. i've got a sister living on the east coast and she can get me "live oak" leaves, has anyone ever used this before? i'm using rain water which has a decent ph but need to increase acidity. i know that there are all kinds of oak but are they all safe to use in this situation? other suggestions will be greatly appreciated. i've got several species of apistos and they seem to be willing to breed and lay but are unable to raise the brood to maturity....help!!!!