drop checker - how much tank water to let in
Funny question here. My drop checker keeps slipping off the suction cup and falling to the bottom of the tank. The suction cup itself doesn't appear to be defective. Perhaps the fit isn't right. I do notice that, the more air is trapped in the fat part of the glass chamber of the drop checker, the more buoyancy the drop checker has and the more upward pressure for the unit to come off the suction cup. I'm now trying to expel more of the air bubbles in the drop checker and let the tank water come up most of the way up the chamber without spilling over to the other side and contaminating my 4dkh solution. I also want to make sure I leave enough air for the drop checker to do its thing. Just curious whether anyone else faces this issue and whether you have any other solutions. I may just need to get another drop checker. Thanks!