Lighting and algae?

[Slyguy00]

I don't have a good nitrate or nitrite test right now just a crappy nutrafin. I use salifert for the big 3 though. Would you suggest getting a salifert nitrate kit or a hanah checker? I am actually curious to know an accurate nitrate reading coming out of ro. The water must be bad though because iv only ran about 100-150 gallons of water through my ro and already the sediment filter is turning brown.