for my new tank (29gal, just over 2wpg and DIY CO2 and ferts) which im in the research phase of at the moment im looking into different substrates and im leaning towards flourite black with a possible bed of peat moss underneath, so has anyone used flourite black?? on the seachem site it has the "concentration of nutrients" for each different type of flourite and i was wondering if it actually made a difference in plant growth? and would the texture be to sharp for my khuli and dojo loaches? i was also thinking of mixing another type of flourite with the black but if they ended up mixing it would just irritate me forever until i fixed it.