water changes in fry tank

[rdrooster]

My triple reds have two day old fry in a 29 gallon tank. I've heared you shouldnt use conditioned water untill the fry are at least 3weeks old. How do you do frequent water changes without conditioning the water? I usually use prime to condition the water and seachem discus buffer to lower ph to match the tank.. Which is at 6.2

 

[DBlauj]

I've done regular water changes with week old fry with no problems. Most of my tanks are 20Ls but I have one 10g and have done the same in my old 29g. My water changes weren't huge though. Usually about 10-15% weekly. I also use prime with no problem.

 

[rdrooster]

Thanks for the help. Are weekly water changes enough or is it better to do them more often?