geez those heads really look good inside. How long has it been since your last service or since you put them in??
what kind of solution we talking wee-man? 1 is to 2? 1 part vinegar 2 part water?
wow 1 is to 20! that weak. i would of used 1:0! learn something new everyday, espically in this hobby! warr what kind of solution did you use?
Warr you made me feel bad and I just cleaned my skimmer cup. The stuff around the inside of the neck was so thick the neck was basically closed! (don't try this at home)