Starting Over 90G reef

[Sarahbell430]

So - huge cyano bloom and LFS told me to dose back to back chemi clean. cyano did not budge and had major coral loss.
After this awesome forum, it was suggested I go lights out for 3 days and then huge water change. Today is the end of day 3
Tested water last night and had an ammonia level of 2.0, so I did a 25% water change last night
today ...lights are on...tank looks fantastic (clean) Fish are great. corals left look okay , 1 duncan frag, 1 zoa frag and a pipe organ frag. Fish are 2 baby clowns, a starry blenny, orange tail damsel, 1 purple fire fish, 1 lavender tang and 1 lyre tail anthias.
Cleanup crew is alive and kicking except that I can't find any hermits.
My fire shrimp is still alive but paralyzed ( not sure if he is molting or the chemiclean injured him.
Anyhow.....parameters now are:

Ammonia .5
Nitrite 0
Nitrate 0
Kh 179 ppm
Phosphate .25
Ph 8.0
Kh 179 ppm
Calcium 480 ppm

I am planning on another water change this weekend to get rid of the ammonia. I also purchased Phosguard but I don't want to use it unless I need to - mainly got it for its silica removing properties as I read that is where cyano comes from

Please help

 

[mcgyvr]

Silica is what diatoms feed off..
Some people though think that running GFO will cure their cyano..
I personally have not found that to be true..
Seem plenty of systems with undetectable nitrates and phosphates still have cyano issues..

But yes your phosphate level is higher than what most would recommend for sure..
Likely due to overfeeding I'd bet..

Personally I think you just need to do more water changes.. A few big ones as soon as possible along with siphoning out as much of the cyano as you can..
Let the lights back on for a week or so and you can do another few day lights out again along with siphoning/water changes..

The solution to pollution is dilution.. Water changes excel at that...