Lube

[Stones]

I've used the silicon based o-ring lubricant from Lifeguard and it works great. I actually cannot assemble my red dragon pump on my skimmer without adding o-ring lubricant as the needle wheel housing fits extremely tight against the o-ring. Without the lubricant, you can only get the housing 9/10ths of the way back onto the body of the pump. The lubricant should also help prolong the life of the typical hard to find o-rings that most aquarium pumps, unions, and reactors use. This lubricant is reef safe and completely inert in salt water.