well i tested my system and i sprung a leak from the ebb and flow fitting on a bucket. i managed not too make too big a mess but im worried because my bucketgs were only half full. anyway i was wondering if i could use a rubber o-ring seal between the plastic washer and bucket since there is only a rubber seal on the inside as of right now (obviously not doing a good enough job). id rather do this than caulk all of them.