12-18-2010, 09:55 PM
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Nitrates and water change frequency
I have a 33 gallon tank with freshwater 5 freshwater dwarf puffers, 2 oto cats, 2 goby, 2 khuli loach, and a shrimp army. The tank was fully cycled when the first fish were added. While researching puffer care the consensus is 50% water changes every week - supposedly very messy and sensitive fish. I have followed this schedule but every time I change water all parameters are ideal - ammonia 0, nitrites 0, nitrates below 5ppm. The tank is well planted and filtered.
Is there any reason to change water so frequently if all parameters stay low? At what level of nitrates does it makes sense to change water?