I have this space which i need to fill. Originally when the tank was set up i had a prob with bga on the substrate so i filled it with crypts and although they served a purpose they grew like mad and took over the front of the tank .Now with no bga, ive removed and given away most of the crypts. I'm just wondering what i can replace them with? any suggestions appreciated .(the white thing at the bottom of pic is a sae grazing)