04-13-2011, 11:19 PM
| || | My opinion...
This question has many answers and opinions. No, it isnt necessary to gravel vac at every water change, only if it needs it. However, it is important to make sure and move the gravel around a bit to avoid toxic build ups. If your tank is stocked heavily or has a heavy bio load, more frequent gravel vacs will be needed, as with overfeeding. Depending on filtration, stocking levels, bioload, tank establishment and personal choice, some people do water changes either weekly, biweekly, or monthly. For me personally, on my larger tank I do a monthly gravel vac and water change (usually about 30% water change). For me it works fine. Even though I am overstocked, my water parameters stay in check and I have enough filtration for an 80 gallon tank on my 29 gallon, plus my tank has been well established. For my smaller tank, I do a small partial water change weekly (about 10%), and only gravel vac once every month or month and a half. This tank has also maintained stable water parameters even though it too is overstocked, but again, I am running 10 gallon filtration on a 5 gallon. (15 gal replacing it in May). That's my experiance with it, hope it helped some.
Originally Posted by unlimitedx
Is it necessary to siphon the gravel for every partial change? I was wondering if anyone performs biweekly water changes, and then siphon the gravel once a month/every two months. Has this worked well for anyone?