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Well I don't know what has happened to my posts for this thread but two seem to have gone walkies. I don't have access to a microscope I am afraid. Increasing the ripples helped break up the scum and then yesterday I added my usual ferts and followed up with a second dose today and the scum...

"As long as we know that we have more than enough of each nutrient then we needn't ever worry about actual values or actual ratio of values. I find the concept totally liberating. " Isn't it just!! I have altered the angle of my filter output to increase the surface ripples and it seems to be...

Yes coming from a reef tank environment that was my first reaction until the leaves on those plants I was trying to dwarf at the front of the tank, and one of those was only 1 1/2" tall, also turned pink.

Thanks for the replies. Firstly I have to say that there are very few ripples on the surface and these are confined to one side only. Could this be the reason that the opposite end sees the greatest build up of scum? Anyway I will adjust the filter outflow accordingly. Secondly water changes...

My 6' low tech planted tank has been set up for eight weeks now and in the last week it has started to develop a brown surface scum that keeps building up. Today I cleared it by floating newspaper but by this evening it was coming back again. I am using a Tetratec Ex 1200 cannister filter and...