Sounds somewhat like BGA. If that member really wants some planted tank advice, he/she would come on over to read this board - rather than vice-versa..
Java Moss does not cause a surface scum to form. This is a naturral occurance. Surface agitation can reduce it, or you can try to absorb it by laying a paper towel on it. I've read where Mollies will keep it cleaned up too.
A forum community dedicated to aquatic plant owners and enthusiasts. Come join the discussion about collections, displays, tanks, styles, troubleshooting, reviews, accessories, classifieds, and more!