goldfish620
Aquarium Advice Apprentice
Hi my little brother has a small 1 gallon tank with a beta fish and I have a 10 gallon tank. I looked at his tank today and found brown stuff on the gravel and decoration this has never happened to my tank before because I have goldfish (really maintained) I know I am upgrading tanks soon. But help its gross I have never seen it before and this is not my tank its my little brothers.... Thanks.
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Sent from my HP 7 using Aquarium Advice mobile app