Originally Posted by
rickztahone
You can use Prime/Safe before you add your new water. Simply dose for the entire water volume of the tank, rather than simply what you are putting back in to the tank.
If you go to Jehmco.com, they have some great solutions for water changes as well.
The way I do it is easy, I have a bulkhead at the back of my tank. That drains the tank to roughly 75% of the tank and it goes straight to my front yard by way of PVC. I have a strage barrel next to the tank (55g) and I pump the water with a submerisble pump back in to the tank. I timed myself last time and I can do that in roughly 15minutes. If I siphon tank floor, add 5 minutes to the equation.