Question about changing MH ballast

[apexifd]

Originally Posted by Casey8

Do you mean my tank has too much nitrates and phosphates ? ... I have never tested for them. I didn't know the yellow is the hardest to keep their color.

yellow should be the easiest to keep, as long as you can keep the nutrient low.

few things that you can do are:

over skimming
less feeding
more frequent water change
macro algae
mangrove
less fish
bio-pellets
zeo-vit
etc etc etc

or plumb your tank straight to the ocean.

I personally didn't change water for 4 months, and everything keeps their color well.