Guppy only uses front fins
My guppy only seems to use his front fins and not his back fins. He also seems to hang around the filter stream alot. I would assume only using front fins would tire him out but he just keeps swimmimg in the stream.
Its a 45L tank. Did a 10l water change 2 days ago (weekly). Test kit showed nothing weird (no3, no2, gh, kh, ph, cl2). Just did a nh3 nh4 test which showed around 0.2 mg/l. Heater is set to 25c but tank reads 28c, probably because its been really hot weather for a long time.
Actually before he showed this behaviour it hid in the treasure chest alot