I'm cycling my tank w/ 3 tiger barbs and my levels are 0.25 ammonia and 0.25 nitrite. I'm just using the tiger barbs to cycle. Is it safe for me to return the tiger barbs now and get 3 julii cory cats?
does it really have to go down to 0 or are those levels low enough to be safe?
does it really have to go down to 0 or are those levels low enough to be safe?