Liverock losing color/coralline algae.

[vanos]

Over the years I have noticed that my live rock has been losing it's color. Some have turned white. Is this due to low calcium or urchins eating the coralline? Thanks,

 

[valgae]

do u have urchins? some do eat coralline.

 

[mpdan]

i have an urchin and it cleaned off one side of a piece of rock about 2 weeks ago and i am already starting to get more coraline growth on the piece that was cleaned (eaten) and though out the tank

 

[pete159]

maybe not powerful enough lighting, and low calcium...
make sure its always above 450

 

[vanos]

I've never checked my calcium levels and I change my pc lights 1x/year. Thanks for the help.

 

[valgae]

pc's should be changed every 6 months. the color spectrum can change and cause undesireable algae growth.

 

[it's chuck]

eiher your calicum or alkalinity is low and your tank is breaking down the coraline to try to suppliment it

 

[spanko]

Can't say for certain what is happening in your tank but;
Urchins do eat coralline.
PC bulbs should be changed regularly, 6 to 8 months.
Calcium, alkalinity and magnesium need to maintained at natural sea water levels.
To facilitate good coralline growth.

 

[manners]

how often should you replace t5s?