shrinking kok

[Magnum Man]

I'm surprised...

 

[blue2023]

do flower horns like hard water??? if you are using crushed coral on the bottom, that is likely going to raise the hardness ( calcium level ) and maybe you have soft well water, and did that on purpose, but my well water is rock hard ...

Yes flowerhorns like hard between 10-20 and mine is around 250