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High light and CO2 - photosynthesis on sand??

PM

Member
Joined
15 Dec 2007
Messages
615
Location
London
Hi guys,

Quick question, with high light and CO2 is it normal to have bubbles forming from photosynthesis on light sand?

This is happening at the front of my tank, the sand is very light in colour also, and the tank is only 30cm deep.

Is this a problem? Start of BGA or something else??
 

PM

Member
Thread starter
Joined
15 Dec 2007
Messages
615
Location
London
It happens after the lights have come on. It's not excessive, but I recently increased the light, and noticed it (I don't think it happened before, or at least I never saw it)!
 

Ed Seeley

Member
Joined
3 Jul 2007
Messages
3,261
Location
Nottingham
It sounds like there is some algae in the sand that is photosynthesizing and releasing gas. It's nothing to worry about IME unless the algae gets too thick and stirring and syphoning off the sand during water changes usually keep it in check.
 
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