QT water changes

[JOEYRM7]

I have 2 QT's set up but since I'm running the display tank fallow I have not seeded a sponge filter nor did I transfer any water from the display to the QT's. Does anyone have a feel for how much of a water change I will need to do? I have 1 angel in each (10 gal and 20 gal tanks). I will test the tanks but I'm looking for a feel so that I know how much water to prepare and how ig a job it will be. Thanks.

[Randy Holmes-Farley]

What's in the display tank? Anything alive?

Some live sand or live rock makes a nice starter for the nitrogen cycle. That's what I usually use.

You might also think of using water from the display tank for the QT tank, and put the new salt water into the display tank.

I don't know how fast you'll need to change the water in the QT tank if there is no possibility for using something with an established set of nitrogen processing bacteria. I wouldn't plan on less than 100% per day.