I watched several videos to replace spider gasket . Looked fairly easy! Wrong ! I have a pentair 6 mutiport valve and it's totally glued down, was wondering if there's something to use to help it along (or would it ruin anything) or any specific tools that would make the process easier? And how clean must it be if I'm lucky enough to get it off? And can I just spot glue the new one? And how long should I leave pump off before starting? One last question- I started this last night around 6:00 pm - how long till it affects water chemistry ? It's June but cooler than normal right now but then again the weathers been greatly fluctuating here in Pa. Thanks for any greatly appreciated advice in advance. I hope I don't have to purchase a whole new unit. Money is very tight right now