Qns to ans.

[AquaRa]

wad the the lifespan of rowaphos in the rf? how long must you replace it? how do i get rid of the thin layer of oil-like film on the surface of my water and what is that actually?

[blueheaven]

Are these qns bothering the world?

Anyway, the lifespan of rowa depends on the level of PO4 in your water. Basically if you have minimal PO4 addition, it will last longer. That film on the surface I believe is caused by minute bubbles in your tank. So it becomes some sort of a skimmer and the gunk just accumulates on the surface. If you do not have a overflow, one will solve the problem. If you have an overflow, make sure the surface ripples do not deflect the gunk away from the overflow.

[woonming]

wad the the lifespan of rowaphos in the rf? how long must you replace it? how do i get rid of the thin layer of oil-like film on the surface of my water and what is that actually?

PO4 media lifespan is very much decided on each reef tank bio load and systems.

Using a good PO4 test kits would help you on knowing when a change of media is needed.

You can remove the thin layer of oil by using an overflow box. (check out our sponsor IAN for an overflow box) or using a surface skimmer and hook up to a canister filter.

Hope this helps.

[AquaRa]

haha, thank you.