A question for all Tunze users, I use mediarack with 9002,everytime I cleaned my filter floss, the water level will raise, so that the skimmer won't work unless I adjust the skimmer level, how do you guys solve this problem?
Just 2 things which happened to me with the Tunze 9002.
Number one: When you did the modification with the air intake and you used a normal aquaristic plastic hose it will bend sooner or later preventing enough air to come through to the skimmer. The bend will be exactly where the cable and the hose exit the skimmer. After some time the plastic of the hose will become also very stiff worsening it. What I did was to cut the inner part of the hose up to the exiting hole of the skimmer and attached one of those L-shaped hard plastic bends then abit of hose again and another L-shaped hard plastic bend. This way the hose won't bend and get clogged and the rest of the hose is facing straight upwards paralel to the skimmer.
Number two: The stock L-shaped bend which is used to connect the air intake/hose to the skimmer got stuck at mine with salt and also causing a reduced air flow. You might also want to check that part from time to time, too and clean it out with a tooth pick or a needle.
Here is a great, easy mod to make dialing it in far easier. Have fun!
YouTube - Tunze 9002 Modification