Need Coraline Algae....(EDM)

[Carandiru]

Im not sure about PurpleUp - on the fence - its a calcium/iodine supplement with tiny particles of aragonite...

You still need a piece of rock with purple coraline algae on it to scrape every few days. Your also supposed to put it in a high flow area.

I'm trying to propogate with just keeping my parameters in check, low nitrates, very low phosphates seems to be key. I'm also dosing a two part solution.

What I would like to know is if PurpleUp actually works or not cause I'll buy some too if a few on here with experience could tell us.