Daddynev
Aquarium Advice Regular
Hi all, despite trying to go for a fishless cycle I have found myself in a fish-in cycle. My tank is a 35 litre which which has been running for about 6 weeks and I have had 4 male cobra guppies in the tank for 5 weeks. I started using a bacterial supplement rather than pure ammonia so I know I got that wrong and since and have been water testing and doing pwc every day. I think we are now in the nitrite phase as this is spiking. We've just been away for 5 days and am really pleased to say that all the fish survived and still appear to be ok! However the nitrite was off the scale when I got back and tested it yesterday. I did a pwc then and two 50%s today but the nitrite still seems to be about 1.0-2.0. I can't seem to get the ammonia below 0.25. I am using the Api master test kit. Should I do another change tonight? One of the guppies does seem to be spending a lot of time at the top of the tank. Also there seems to be some brown algae on the rock but I believe this is quite normal, am I correct?
Thanks
Thanks