i did have a similar problem with a different tank using elements fresh squeeze completely rotted the o-rings out in a few hours i gave the tank a good wash with warm soapy water rinsed it all off put on new seals and all was good spoke to the guys at one of my local shops and they reckon element is notorious for it swap your juice you should be golden.
ive got 2 mesh pros ive never changed the seals one is 11 months old and the other about 9 months great tanks
I've been using the same juice this whole time. Premium labs and cactus. Same wattage and coils.