HELP!!!!!

Your nitrates are zero I'm assuming as well, and your phosphates read zero because your CYANO is sucking all the nutrients out of the water. What is your feeding schedule/how much do you feed when you do feed?
What kind of food do you feed? Some foods give off phosphates 

 

How often are you feeding? My gha didn't start to recede until I cut feelings down to 3 times a week and did many partial water changes. Now I run a brs Gfo reactor with aquamaxx Gfo. Slowly all of my algae is going away.

 

Your po4 and no3 are reading zero because your CYANO is sucking all the nutrients out of the water. Suck all the CYANO out of the tank, or as much as possible. I would rinse your mysis shrimp before you feed.

Also it sounds like you started having problems with your corals when you put that new batch of phosguard in your tank. If that's the case, I'd get rid of that immediately. Watch your feeding, and rinse your food. I'm battling CYANO right now too, how old is your tank?

Mines only a year old, so this is all part of the cycle. You could invest in an algae scrubber, from what I've seen and read, those things do miracles for tanks with algae problems.

 

manually rid the tank of as much nuisance algae as possible. cut back your feeding a bit if target feeding isnt working out. and rinse your frozen foods before adding it to the tank.

the tap water may have let the rocks trap phosphates over time, now that you are adding RODI it is leaching it back into the system. and the algae is immediately consuming it. soon the algae will consume the last of it and it will pass

 

Removing phosphates too fast can put corals into shock. Cut feedings and do a couple 25% rodi pwc per week and it will eventually die out. Along with as much manual removal as possible. Do you have a Tds meter to test the rodi?

 

If you can get a bucket of saltwater, and take rocks out one by one, and scrub them with a tooth brush(if you can), if you got corals attached to the rocks, that's outta the question unless your very careful. I would ditch the phosban for the moment, especially if your corals are doing bad right after you added a new batch.. Still a fairly new tank, but I'd cut back feelings of your corals to 1-2 times a week and feed your fish 3-4 times a week, or every other day.
You never did say how much you fed your tank every time you feed. How many cubes is the food you feed to your tank equivalent too?

 

Algae scrubber!!!!!

 

Ok that's not too bad. Take your TDS meter and measure your RO/DI water, and measure your tap water as well. Then post your findings

 

I have a TDS meter on my rodi too, but I don't trust it. I use handheld..

So ignore that other post..

You said you were using tap water before your rodi so chances are your tap water is pretty high on TDS, my tap water is around 200.. Pretty bad. So your rock is leaching phosphates and will continue to leach them for some time to come.. I'd recommend doing weekly water changes, 30%, take the rocks out one by one and scrub the algae off of them. Back off on the phosguard before your corals get any worse. I agree with dubber, you probably added too much too fast, and that is a big no no. Ease into it next time over a month before hitting full dosage.. I know all this is gonna be a PITA to do, but its nevessary to combat your nusance algae. Happy Reefing..

 

Ever think about just dumping the food into the tank and letting it blow around from the power heads? Afterall, this is how they eat in the wild, and it's how I feed my tank as well... Works good.. Just a thought

 

Ok first off what kind of lights how old are bulbs. Often times that can be an issue if the bulbs are old. Your sps dont really feed on puggle its mostpy for things like your pod population I would stop using it. Are you finding the mysis be use you need to as it contaons a bunch of po4. Try rods food its pp4 free. My guess is you have a lot of waste from this most coral do not need this. Jam on my phone so sorry if this is hard to read

 

Read my post and I will have to repost when iam not on my phone