kalk and p04?

[Dr.Nate]

I was just going through and reading some old posts and someone said that dosing kalk can precipitate po4. Anyone ever heard this?

I've also read some folks saying that urchins will eat cyano. Is this true or not? Is there anything that will?

thanks!

[seaham358]

IMO there are no critters that will eat cyno. I have tried a long list of inverts and none ever ate it. I had some snails that would plow through it leaving a trail which may lead some to think it ate it, but they don't. Never heard of the Urchin.. I know they eat coraline algae..

Never heard of the Kalk and PO4 either..