Substrate Choice: Anaerobic Disaster Waiting to Happen?

[xiaoxiy]

Hey guys,

I'm setting up my first planted tank and have been debating between using either fluorite or MGCOPS capped with fluorite. I plan on using egg crate and mesh to create a sloping scape (to give it depth), but I'm worried that the MGOCPS (right above the mesh and egg crate, and right below a layer of flourite) will provide anaerobic bacteria the nutrients to grow in stagnant water pockets created by the egg crate. Do you guys think that this would be a serious enough of an issue for me to go straight fluorite?

Regards,

Xiaoxi