Too much circulation?

For a 30 gallon tank with clowns, live rock, and potentially both soft and hard corals, is 420 gph too much?

Amazon.com: Hydor Koralia Nano 425 Aquarium Pump, 425 gph: Pet Supplies

 

I run 3200gph to 4700gph on my 75 gallon mixed reef.

 

thats only a 14 times turnover rate. SPS needs atleast 50x turnover, softies around 30x.

 

I have 2x240 on my 26g + an mj900 return

 

Soo.. what should I use? If I stick with just softies, would two suffice? I'm somewhat at a loss here as far as what I really need...

 

I would recommend 2 of those for softies. I run 3 of them on my29g tank (will be a mixed reef).

I also added a Taam Rio 200 I had laying around, for some more surface tension, but that's not necessary.

 

Well now I'm looking into getting two of these guys:

Amazon.com: Hydor Koralia Evolution 750 Aquarium Pump, 750 gph: Pet Supplies

Thoughts? I don't know for sure if I'll have sps, but it'd be nice to be prepared, so I'm trying to get ahead in the game. The whole circulation thing has always been my biggest source of confusion. If two of these are good, where should I place them? Also, I was looking at this:

Amazon.com: Marineland Ml90512 Maxi-Jet 1200 PRO, 295/1300GPH: Pet Supplies

 

Personally, I think a few smaller powerheads is better than one large one. That's why I opted for the Koralia 425s over the Koralia Evolution pumps. They take up less space too, so that's a nice added benefit.

Here's a quick phone pic. I also have a taam rio 20 at the water line. I am not sure if I will keep it there or not.

 

IMO use a variation of different pumps.I have both koralia nanos and a maxi 1200 in my 20 and the different flow rates interact creating nice currents, swirls, undertoes, etc. I would go with one koralia 750 and maybe 2 425's. I would also put the 2 425's on one side of the tank and the 750 on the other. Point the 2 425s any way u wanna one up one down. and have the 750 blowing across the length of the tank... Thats what i would do.

Just like you when i first started my 20. i had one 425 in my tank. It gave me little flow. On paper the numbers made since for what i was hearing around here but that was before i knew about sump flow etc. everything in my tank loves the current, makes them work a little harder to get around and it makes them feel like there not in such a confined space... in theory : who knows what they really think. haha but i do know when i do water changes and i turn off all the pumps they seem to be like \/\/TF happened?wheres the flow man. kinda funny.

 

Thanks! This is very very helpful. All I can find are numbers, but not placement and things like that. Really appreciate the help!