hello.my tank stats are 175litres.filter.1100litre per hour.koralia 1600.spray bar full lenth of tank.co2 drop checker is light green.2x 24watt T5 lights 6hours on..eco complete substrate . i only recently had to replant my tank due to BBA.i noticed today that it is already starting to make a comeback i use james c EL recipe and dosing i have read alot on this forum about poor co2 usally being the cause of BBA.i use an ae atomiser ,i can see the bubbles getting all round the tank. theBBA is more heavy on the slow growing plants,cryptys and on the subtrate and wood.i have been doing large water changes every couple of days to try and get on top of the problem.i also am dosing the ferts at the high end of the recommended dose. please help aarrggghhh.many thanks.