So I decided instead of using the suction cup on my veggie clip, I went ahead and put 2 magnets together (with 1 side of the finger clip part in between magnets) to give it weight and a more "natural" way of the tang gang to feed (grazing below instead of going up to feed). I put it in the tank in the morning, went to work, came home and took the clip out. I saw "dark sand" on the magnets and thought it was weird. upon closer inspection I found out there's bits of fine sand sized metal in the sand!!! And the magnets were at least half covered in it. So i'm hoping maybe this might be why i could never get my tank "dialed" in quite right? Any ideas would be appreciated. Anybody else ever checked if they had metal bits in their sand? To add, I do collect my own sand from the beach.