Big John
Aquarium Advice Activist
- Joined
- Jun 22, 2013
- Messages
- 112
I have had my tank running for 9 months with no problems but my nitrate has suddenly gone through the roof the tank is a 55g with 15 fish in. 3 of them are around 6 inch the rest are 3 inch or smaller. I normally do a 40% water change a week and have no problem. What should I do? Is it just a case of do lots of smaller water changes or can I be doing something else to help. Fyi I have 2 external filters running at 2000 lph and have not added any fish for around 4 months
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