So I have a 300 fowlr tank. I have connected to the sump an iwaki 70 and and iwake 55 that are 22 years old! The iwaki 55 just started making a noise and realize that it's not pumping so I disconnected it. The iwaki 55 was added when at the time the protein skimmer ETSS instructions stated in should have its own pump. So I'm thinking after 22 years even though the pump looks brand new it is probably not worth fixing. The sump was drilled for the 2 pumps. I like the idea of having 2 pumps because if one failed I would have a quick disconnect to feed the primary return lines. So the question is what would be a good replacement ? Someone I know is offering to sell me a vectra s1 that was only used for 3 months for 250. Reviews go both ways on this so looking for ideas. The iwake 70 is still running but it is 22 years old so I'm keeping in ind that it may die soon too. Appreciate any feedback/input, thanks!