Ok I know I will be told it serves me right but I have learnt!
My problem arose when I introduced some duck weed from a pond, (I have since got rid of the duckweed) Unfortunately it was not only duck weed that I introduced! Some small critters came along for the ride and have set up home they are about half the size of a pinhead and smaller, red and look like the underwater equivalent of red spider mite. Also some tiny clear round things (water flees?) how do I get rid of them? The fish are not eating them and there are large numbers of them and I think they are affecting my plant growth. Any help would be great. (fresh water, 3ft tank 33G, 120W lighting, co2, pH7)
David
David