brown film on my sandbed

[buntal]

hi, need help on my tank.encounter some problem on my sand.

found brown film on my sand and its hairy, don know wai is that?

[Gouldian]

Diatoms / Byopsis. If you are currently cycling your tank than it will go away after your cycle.

[buntal]

my tank have been goin 4 six mth.it happen

when i use the corallife salt.But will the brown film

cause any problem to my coral.some of my coral had gone down the drain.

But my LR is changing colour to purple.Plan to change the water........

[Gouldian]

my tank have been goin 4 six mth.it happen

when i use the corallife salt.But will the brown film

cause any problem to my coral.some of my coral had gone down the drain.

But my LR is changing colour to purple.Plan to change the water........

Do you change 10 to 20% of water weekly?

What kind of skimmer you using now?

[giantbicycle]

But my LR is changing colour to purple.Plan to change the water........

purple good wha....corline algale..

[buntal]

did change 25% water but stil have thr brown film.

izzit due to high ca.