I've been using Purple Up fpr a few weeks now, and honestly I haven't seen it do anything yet. My coraline was growing very well on it's own though so it's hard to say what it's doing. I tend to agree with most here that weekly PWC
's will give you everything you need for good growth. That's all I was doing in my FOWLR
and I have green, pink and purple going.
I only picked it up because of what I've been reading from others here, and since my LFS
had a bottle I thought I would try it out. Have not seen a difference yet, but will post if I see a big boom in my growth. Would be kinda hard to notice though. I'm like Brenden in hating to have to clean the crap off my glass. All that coraline growth does seem to keep my nuisance algae at a minimum though, and I'm definetly down with that. My tank would no way support a herbivore. I have nothing to graze on at all