Algae questions

[900dublr]

I bought a bunch of base rock and a couple pieces of lr from my lfs when I started my tank 4 months ago. I bought another piece about a week ago that has really dark purple coraline algae and now its starting to turn white. Its kinda greyish. I have 220 watts of pc's over the tank. Also im fighting brown algae. My whole tank is covered. I had it a while back when I changed lighting but now its back again. I use tap water for now, but im going to start using to ro since I found out its free at my lfs. Is there anything to help the problem?:thinking:

 

[tak1968]

I would say the water. Switch to ro/di water and never up tap again. To many phosphates in tap water or well water. hope this helps. Tak

 

[900dublr]

bump for the lr question.

 

[bang guy]

What are your water parameters? My initial guesses would be:
Salinity is less that 35ppt
ALK is less than 2.5Meq/L
or Temp is different from where it came from

 

[900dublr]

salinity is about 32 ppt and my temp. is 78. Im not sure about alk I need to run and get more test. Should the salinity need to be raised?

 

[bang guy]

Yep, that most likely didn't cause the bleach though. Perhaps low salinity plus something else.

 

[900dublr]

That sucks. I thought salinity is fine 1.022-1.024? :notsure:
Will it come back if I raise it?

 

[bang guy]

It'll probably come back. The darker purple don't like much light so you might get pink coralline instead.