there seems to be a few patches of almost cob web looking things settling over the rocks at the bottom of my betta's tank. Its a 2.5 gallon tank and i change 25% of the water every 2 weeks. It has a filter but i dont have a heater, the thermometer is always a constant 78-80 degrees because it is warm in my bathroom and his light always warms up the water during the day too. So i really dont see a use for a heater. I think im going to take my gravel vacuum today and just clean out his gravel.. but i have never seen this happen before. Just wondering what it is?
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