hear algae + browning corals

[ScubaSteve]

First mistake is using frozen seafood. Most contain a ton of nitrates and phosphate. I did a big post on this a while ago. Search for the explaination. Use fresh to prepare your food mix then freeze it.

Again, you're not going to be able to measure it because the corals and algae are using it up. The 'trates are being used up as fast as they are being produced or added, so you're not going to see a build up in the water but you ARE going to get brown corals and lots of algae.