The #4's should be fine, but if you can afford it, look at the Vortech MP40W. I have run Koralia's exclusively since the beginning, but finally tried the Vortech about a month ago now... All I can say is this unit far surpasses any of my Koralia's for flow and of course you have the ability to change things up with it. the programming in the Vortech lifted hidden filth from behind rocks and crevaces... I can say it works great!

Ya that Vortech is sweet maybe some day. I am trying to get the 155 BF up without braking the bank & most of all **** off the wife with how much I have already spent,LOL. What she don't know wont her me unless she get's out the calculator & all the bills.

where do you get the sunsun from ?

Got mine from a LFS in Calgary called Ocean City. I don't know how widespread the distributorship is on them yet.

I ordered a sun sun off e-bay they are like $10 + $10 shipping mine didn't seem to have any flow at all. I used the magnet for a sure-flow mod and it works like a hot damn.

Got mine coming from E-Bay as well. Have not arrived yet & can't wait for them to get here.

Where did your's come from? Was NIB or used?