Another Nitrate/Phosphate Question

[NaClH2ODave]

After noticing some LPS and SPS corals struggling, I decided to test both on a mature, 105 gallon tank. Nitrates were over 50 and phosphate was 0.11. I started dosing Red Sea NO3O4, and within 3 days, phosphates were 0.00 and nitrates have started dropping. A week later they are at 25.

I'm concerned that 0 phosphates may cause other problems. Is there any way to bring them up slightly? I've also started feeding a teaspoon of Oyster Feast nightly.

Thanks

 

[coralcruze2020]

zero po4 to your current No3 levels is off balance and may inhibit no3 from reducing. you are correct. feed more and lower WC.

 

[bertoni]

A little more food might help make sure that there's plenty of phosphate available. Our test equipment is only so precise, though, so I wouldn't assume that zero measured phosphate indicates a problem. Anaerobic denitrification can remove nitrate without consuming net phosphate. That's how live rock works, or at least, how we think it works.

 

[coralcruze2020]

thats so true about our home test kits... especially low range Po4. thats why its always good to follow up with an ICP test every so often to check your kits.