I have had my tank running for around four months now. Inside I have four danios, two large gouramis, two dwarf gouramis, black and leopard catfish, little orange loach, black and orange finned shark and three guppys and a few snails that appeared from nowhere although I think they was on the plany when i bought it. Recently I have found in two places which I can see, almost like a bubble with little white circles inside of it. Ones on the side of the tank and another is on the bottom of the tank. I have put pictures in to show. Does anybody know what this could be?
