I have a freshwater aquarium (5g) with one betta fish, with a filter and heater... The heater is supported in the water by rubber suction cups, both cups are submerged. The outside of these cups are covered perfectly with white/cloudy/furry looking stuff. It is very slimy. It is only on the two rubber suction cups, nowhere else in the tank. I have cleaned the cups before, the stuff comes off fairly easily. As soon as the cups are back underwater, the stuff starts growing back the very next day. It is not spreading onto the glass, but does look quite thick in some places (maybe even connecting the two cups together). The fish seems uninterested in it, and overall seems well.
Any suggestions on what this fast-growing stuff is?
Cheers
Any suggestions on what this fast-growing stuff is?
Cheers