- Reaction score
- Just started
I am cycled a month and a half, haven't had any trouble until I pulled my carbon out and started using purigen yesterday, my nitrate level skyrocketed went from 5.0 to almost 40. My question is, is this normal and besides water changes what else can I do? The tank is a 20 gallon with a Fluval C2 HOB and an undergravel filter with two 30 gallon air pumps.