Hi. Had algae issues some months ago, mainly in having to clean glass too often. Was running a reactor with phosguard at the time. Was put onto Nopox by a mate. 350 ltr, started at 10ml daily. Nitrates where at 50+, now 10ish. Stopped phosguard before introducing Nopox. Phosphate is now 0.03 or lower. So what's the problem? Well, I'm mainly into softies. Had some cracking mushrooms, leathers, polyps etc, they have mostly died back now. Duncans, candy canes, torch coral and other sps fine. I want the softies in new 500 ltr set-up, and don't know whether it's best to ditch the Nopox or, with the doser I'll be using trickle in a tiny background amount? What's your thoughts please.? I've highlighted areas of my sump, that from my freshwater days, I've inadvertently created dirt traps in. Using deep layer of filter floss sitting above a lot of denitrate, before this is alfa grog, 4" x 4" course sponge below intake. Not ideal I've now decided. New sump won't be having these.