Yeah, you can get caps from the fat sac manufacturer. You can also go to a waterbed store and use the caps for those. I have also heard people using the caps off of ketchup bottles. I don't know if they work or not though. If you want to use an aerator type pump, I would go for a rule 2000gph pump. Some people use reversible pumps, I've heard Simer is good. I'm sure others could help you on this though. I don't know a whole lot about those.
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