NO3 8-10 and PO4 .02-.03

[tobster]

I’m having a big algae outbreak along with cyano algae- tank is about 12 to 14 months old and is about 140 gallons.
I started using Phosguard a few days ago to try and lower the PO4.
I’ve changed about 20-30% of water over past week to try and lower NO3.
Should I use NO POX to knock down the nitrate and phosphate?
Is this what is causing the algae and cyano?
I went through this ugly stage about three or four months in and everything cleared up and was great and now it’s back.
Any help would be appreciated.

 

[rtparty]

Driving nutrients down won’t solve any issues. Algae is a symptom from not enough herbivores.

 

[tobster]

Driving nutrients down won’t solve any issues. Algae is a symptom from not enough herbivores.

I have a pincushion urchin, bunch of snails, couple tangs and large turbo snail that feast on algae.
Tank has been algae free for half a year and now it’s back. If nutrients wouldn’t cause it, what would?

 

[rtparty]

I have a pincushion urchin, bunch of snails, couple tangs and large turbo snail that feast on algae.
Tank has been algae free for half a year and now it’s back. If nutrients wouldn’t cause it, what would?

Have you replenished the clean up crew lately?

 

[tobster]

Have you replenished the clean up crew lately?

Yes probably within last month or so