2 phase attack peroxide then AF Marine
2 phase attack peroxide then AF Marine
Thanks for this thread. I've read it cover to cover over the last month, and finally decided to deploy AF Marine to combat some nuisance HA.
I have a 57 gallon rimless SPS and Zoa system. My params have been stable - salinity at 1.026, nitrates 0, phosphates, 0.4, Alk 9.0 Ca 430 Mag 1300, PH 8.3. I have a reasonably well stocked tank with 3 different types of Anthias (dispar, resplendent, lyretail). I've been struggling to eliminate some nuisance HA. I run TLF reactor with GFO and run my cone skimmer full time. I have a 48x3W cree LED fixture ramping up to 100% for about 4 hours and ramping down for a total photoperiod of 12 hours. I have an Eheim 1262 return pump and 2 MP10's, one running Nutrient transport mode and the other running reef crest mode. I have a DIY ATO with Kalk in the reservoir. I do 5% water changes weekly, but despite what I considered reasonable husbandry practice, I ended up with HA. I believe that some of the rocks that I had from my prior system started to leach phosphate, which despite having reasonable params, encouraged HA to get a hold. My system has been up for about two years.
Before I started dosing AF Marine, I took most of the rock and treated with 3% peroxide outside the system. There's a thread in RC about the procedure. This seemed to breakdown most of the holdfasts, and, got the majority of the algae exported from the system, but the algae started to slowly com back. The peroxide did fry my coralline algae, but it started coming back almost immediately. So I did one more peroxide treatment before I started dosing AF. It was about 3 weeks after I had treated with peroxide that I started dosing the AF.
I'm at 3 doses of AF Marine. I dose 5ml every 3 days. I figured my actual water volume including my sump is more like 70 gallons, but I decided to start with 5mls instead of 7mls as directed. Most of the algae is receding and getting thinner every day. Prior to each dose, I put my filter socks in place, blow detritus off all the rocks with a spare powerhead, vacuum my shallow sand bed (1") and once the water clears, do a 5% water change, then remove the filter socks.
Seems like my CUC are more active and consuming the algae off the rocks that they ignored previously. I'm running the skimmer wet, and continue to keep the GFO reactor online. All my livestock looks great, full PE on all my SPS, and the zoas have never looked better. I'm optimistic that with a few extra doses that I can ramp AF down to a weekly maintenance dose.
How long are people running their maintenance doses before discontinuing the use of AF altogether? Based on what I've read here, its important to keep running the AF in maintenance doses for a while until the algae spores have run their entire lifecycle.