i have a 175 litre tank,i am using james c fert recipe and dosing guide lines.i have 2x 24w t5.the filter is a efx300 rated at 1100litres hourand a koraliapowerhead at 1600litres hour,the plants are doing great apart fromanything close to the substrate,i was doing ok with H.C.but it has been pulled out mostly by a couple of angel fish.i am getting a green algae covering the open areas of the substrate (eco complete )i have beenfighting this algaefor weeks, i was cutting large areas of H.C.right down to try and combat it,i have applied easy carbo to infected areas with no flow in the tank,it did not solve the problem,i am using co2 ,50 bubbles a minute,the drop checker is a light green,i put the drop checher in various spots to check the co2 is getting round the tank,the koralia is pushing the bubbles down to the substrate.i am pulling my hair out trying to solve this problem,any help would be great,many thanks