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post #1 of (permalink) Old 12-07-2012, 05:33 AM Thread Starter
Hardstuff
Planted Tank Enthusiast
 
Join Date: Oct 2012
Location: mesa
Posts: 500
How long can a fully cycled fishless 10 gallon tank go without ammonia source?

I have high nitrates from a long run time of fishless cycling, 3 months. It cycled 2 months ago, although I did water changes I lost track of nitrates at a point. I used a lot of r/o water so it was some work for the changes. Now this tank is supposed to be my q.t tank for quarantining fish. I am ready for fish but I have done 3 50% water changes in 24 hours & the Nitrates are still over 80 ppm or higher. The big question is can this tank run more than 24 hours without ammonia source??? It is fully cycled but I am concerned about crashing the system. Input please since I am not sure & do not want ammonia & nitrite spikes for new fish, thanks.
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