The only high thing is Nitrate, which has been in the 50s since April. I've seen some algae bloom slowly start over the last six weeks, but we were out of town for eight days and came home to an abundance of GHA. The fish, corals, and anemone seem unbothered right now, but we're going out of town again in a few weeks, and I'd like to try to get it somewhat under control before we go.
Let's see that GHA garden!
Quick Qs:
1. This is the red sea max nano with Caribsea Life rock?
2. Phos around zero? (It's not zero)
3. Two clowns a watchman and a firefish?
4. What kind of food?
Nitrates are probably running much higher and Phos also higher but getting consumed immediately by the GHA. That stuff feeds off the life rock, that's what I had in my Evo.
A few things that worked for me:
1. Switching up foods. E.g, moving from pellets and flakes to some pellets and Reef Nutrition ROE / pods / mysis.
2. Draining the tank part way (enough to expose the GHA on top of the rocks), yanking all of it out with paper towels--keep the corals wet using a feeder pipette dropping saltwater on them every 10-20 seconds--then when the rocks look almost bare of GHA, give them a spritz of hydrogen peroxide using a spray bottle, enough to cover the surface but not begin to saturate the rock. Let it sit for a few minutes while keeping the corals/nems hydrated. After a min or two is up, replace the water in the tank to normal levels. This is not a "rip clean". It's just to let you get the GHA down to the roots where the hydrogen peroxide will have the most effect and your cuc stands a chance at eating new growth
3. Tuxedo urchin and 2 turbo snails. They'll keep the lawn mowed. You might have to supplement them with nori and/or algae tabs occasionally though. They are bulldozers though, so fasten down those frags super tight!
4. You need more consumers! More coral. Maybe a macro or two. Gracilaria hayi is super easy, beautiful and sucks up nutrients. Some strains of short branch codium do extremely well also. More coral!
This worked really well for my GHA garden in my Evo.