Hello all I would like some opinions about which pump to buy for my 29 gallon reef. I am going to buy either a koralia #1 which is 400 gph, or a koralia #2 which is 600 gph. I don't want a big sand storm, but on the other hand I want as much flow as possible. I have read that the flow is widely dispersed so I thought the #2 might work. Some opinions would be appreciated. Both pumps are around the same price with only like a ten dollar difference so if the 600 gph would be good I will buy the #2 for a little more. God bless.