Nitrates and phosphates, newer tank, cyano

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t5Nitro

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Hey guys and gals,

My tank is still pretty new, about 4 months since cycle completion. More recently I have mats of cyano covering rocks, some on coral. I have DIY phos and nitrate solution that I mixed using recipes found on here. I now am able to keep my phos at 0.05-0.06 (Hanna ULR). My nitrates are still unmeasurable (API nitrate). I've only dosed 6mL over 3 days of the nitrate solution; I mixed it up to the planted tank calculator to give 1ppm per 1mL. Theoretically I should have up to 6ppm if nothing in my tank consumed it. I'm wondering if the corals use the nitrate this quickly that I should be dosing a lot more than 2mL daily, or if this is being rapidly consumed by diatoms or cyanobacteria? Any further steps I should take or just keep on with routine maintenance and give the tank time? I feed 3 times daily either all pellets or pellets/LRS.

Other filtration methods include UV sterilizer, protein skimmer (skimming dry), filter sock and chemipure blue 1 bag passively in the sump. Water changes 1% daily with RODI source.

Today I gave a half dose of chemiclean (read somewhere on here there was success at 1/4 dose) and powered off the UV and removed the bag of chemipure.

To recap: is this unusual to continue to show 0 nitrates with the phos in appropriate limits? Anything else I should be doing with the tank at this stage or to continue on?
 
I don't know if I would shut down the UV.
Granted it has no effect per say on the Cyano but it has other benefits.

If you can depending on your lighting run only blues. It will keep the corals happy but not the Cyano.

I have also started to drain off the extra liquid from my frozen foods.
I know this is not so good for some creatures in the tank but it has slowed the spread of it.

This is a stage as I have been told. My tank is also 4 months along.

I also recommend changing only one thing at a time.
 
I should have added the UV off and chemipure is out temporarily only during a 48 hour chemiclean treatment, just from the instructions on the box. I would try the white lights off but the pure blues drives my purple tang crazy. I could try to reduce the whites if anything!

I use filter socks anyway, at some point I keep meaning to get in there with a brush and wipe the mats of it off the rocks as needed. Any ideas if I should try to keep pushing the nitrate dose to try to get something measurable by hobby grade kits?
 

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