Thanks everyone, will call Glen at Parker to see how much we will be bending me over for a small bottle

Good guys but man are they expensive, have had a few jobs done by them for non marine stuff for Flagswipe.
So this is my plan.
1. turn everything off in tank which will cause the sump to fill up.
2. pump out the left chamber where the overflow fills up into a large holding tank I have
3. remove skimmer, reactors, and about 100lbs of rock from chamber
4. wash as best I can and suck out with shop vac or micro fibre cloths
5. add hair drier to dry and warm up the plastic, I assume this will help with bonding and will get all the moisture out
6. add a small bead of Weld on #4 on all suspicious areas and let dry one hour
7. add a bead f Weld on #16 its like silicone but supposed to use a very fine bead and let dry as long as possible 4-5 hrs overnight would be better but thats not likely to happen
8. replace everything, add water and hope my lack of DIY experience (and success) takes a turn for the better
Ill let you know how I make out !