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Re: Black areas under gravel

CarlaThorn at aol_com wrote:

> I can see from the front of my aquarium that lots of black spots exist under 
> my gravel--is this the anaerobic (sp?) problem I've seen people on the list 
> talk about? If so, could this be a reason my plants aren't particularly 
> flourishing despite the perfect amounts (IMHO) of light, CO2 and fertilizer I 
> give them? My trusted LFS guy tells me I should put a reptile heating pad 
> underneath, a cheaper alternative to coils and just as effective. What do 
> y'all think?
> thanks,
> Carla

Does the aquarium get some light from the room ? The dark spots could be just
algae growing on the glass. 

-Ivo Busko
 Baltimore, MD