dark brown film

[maguz921]

Im getting some serious dark brown film on my rock and sand. I checked the PO4 on the tank and got a 0. I was told this might be as a result of silicates or old bulbs. I use an RO DI and my bulbs are comming up on a year. The only time I remember having a problem like this was at the begining of the tank but then the film was light brown. What gives?? has any one tried phospho sorb pads for silicate removal??

[Grayout]

You can try the phosphate sponge or decrease the amount you feed. I have also found that excessive heat can trigger an outbreak as well. How is your water circulation?

[asca]

I have a similar brown film on my center LR. I did have a PHOS problem but I have been running phos-ban and phos guard. I just finished testing and all seems to be back to normal but I cant seem to get rid of this nasty brown stuff. If this thread doesn't produce any good suggestions I'm gonna scrub it with a toothbrush... I'll let you know if that works

[marineways]

I used algone and it helped my tanks get rid of it. Every5 days I would add new pouches along with coral lifes marine tank clarifier and they worked really well

[johnpoole]

the scrubbing will help, that along with a good regement of phos-ban and phos guard will bring the results you are trying for...just my 2