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Cycling a 29 gallon
I have a 29 gallon tank. Just put 5 cherry barbs in today. The pH was good earlier...about 7.2. My question is, how often should I do water changes during the cycling period? I read that you should do a 5 percent water change daily during the 1st week. Is that enough water? Too often? And do I do the tests (ammonium, pH, nitrate, nitrite) before or after the water change?
Hello, i think you should do abut a 10% water chnage as needed during the cycling period. you need to let the good bacteria grow, which it wont if you take out all the water. as for the tests, do them before water change, so you can see how high they are, the higher the level, the more water to change. Good luck!
You should do a 25% water change weekly on all your tanks. As far as cycling, just change 25% of the water when your ammonia or nitrite exceed .50.
-10x Zebra Danio
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37 Gallon (Wanted)
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I do smaller water changes, just becuase its easierfor me as my tank is a pain to deal with.i do soemtimes do them more often, or sometimes i just let it go and even out. however, i do them as needed based on chemical levels, (though sometimes it makes the tank cycle longer). IVe cycled 5 tanks this way, and have barely lost any fish. oh well, to each his own.
Originally Posted by Shanna View Post
In a new tank at the beginning the ammonia and nitrite will be `0`and once the cycling starts (you add fish) the ammonia will rise and then drop back to `0`and the nitrite will do the same a few days later(once the ammonia has `peaked`the nitrite will start). Ammonia tests should be done every day on a new tank until such time as the ammonia has fallen to "0" (usually 5-9 days). Once the ammonia lvel shows that it is starting to drop, start nitrite testing and maintain that evey day until the level drops to "0" (another 5-9 days). Nitrate can then be tested, and provided it is acceptable (under 40ppm is OK) only periodic tests are required unless it is fluctuating a lot or starts rising--both of which indicate a problem. Once a tank is biologically established (the cycling is complete, anywhere from 2-8 weeks) the ammonia and nitrite should always be "0" and unless you do something to cause the biological equilibrium to crash (neglect weekly partial water changes, add too many fish, overfeed, leave dead fish and plant material in the tank) these will never be above "0".
As to water changes during the cycling, I generally do them once a week provided the cycling is normal. Adding a biological `seed`such as `Cycle`when you put in the first fish will greatly reduce the stress on the fish and slightly quicken the cycling period. Never vacuum the gravel during the cycling period (it will remove the good bacteria you are trying to establish on and in the substrate) and never clean the filter until after the 8 weeks, and then only rinse the media to remove the particulate matter and use water from the tank (tap water contains chlorine which will kill the good bacteria). Filter media should never be replaced unless it is literally falling apart or has lost its usefulness (depends upon the media); it will be colonized with the good bacteria and you don`t want to remove it.
Byron Hosking, BMus, MA
Vancouver, BC, Canada
The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]
Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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