Large water changes input

[kien]

if done carefully (similar parameters as Aquattro suggested) a larger water change (50-80%) should go just fine. This is how I have done tank transfers in the past. Fill new tank 20% with old tank water then the rest with new water. As others have said, you don't want to be doing this on a frequent basis, but for a one or two off event for quick and short term correction purposes larger water changes are fine. A few weeks ago I did two consecutive 50% water changes in my tank to help flush out a treatment that I did on my tank.

[sirruckus]

I appreciate your guy's input on this topic - lots already!

I understand the worry people have with such a large water change, and I agree it should be avoided as best as possible. I can't say that I've done one, and most people probably cant (even those who advocate not to do one) - because it gets into an uncomfortable zone.

But one analogy I heard from someone that was successful:

consider yourself as the fish - trapped in a garage with a car running, filling up with exhaust (Phosphate levels) - opening up the garage door to let everyone out as fast as possible may shock you, but is going clean the air and.

simply - each has its benefit and each has its downfall.