Still having a little problem with bba and bga.The bga is not a bad as it was its more or less confined to the substrate (any advice) where as before it was covering everything.Im getting more of the bba, i am using the ei method.I know that test kits aren`t very reliable but im adding 1/2 teaspoon of kn03 every other day and its still showing zero nitrates will it be ok to up the kno3 a little to try and get the level up.Im adding all my ferts in accordance with the ei .lighting is 6hrs a day 56w t5(reflectors) ,injected co2 drop checker lime green ,50% weekly wc,2 koralia 1 ph ,trigon 190l,tank many thanks.