What is the most quiet return pumps?

[sphelps]

Originally Posted by JPotter

Thanks..for something you listen to every day 1K is not outrageous Do most SW LFS have them in stock? What turn over is required for a very full 120g sps w/fish and no chiller?

I would be very surprised to see these pumps in stock at any LFS, however most should be able to special order them within a week or two.

Your turn over depends on your sump layout and plumbing restrictions but usually 10x is plenty, provided you'll supplement more flow some how for the SPS. My new tank is 100 gallons and I went for the 6.5m3 which should give me around 1200gph with head loss but I'll also be running two tunze streams.

[albert_dao]

For anyone interested, the Red Dragon pumps are also receiving a few awesome upgrades very shortly:

- Anti-calcium bypass, as found on the RD skimmer pumps, will now be a standard feature for all RD's.
- All impellers will now be equipped with Titanium shafts for increased durability.
- Mini RD's will now have custom CNC'd volutes much like the larger Deluxe lines. You can probably expect a slight increase in performance from this upgrade. I'm still not sure if this translates over to being External-use compatible yet, but we'll see in the next couple weeks =D

Pricing should remain constant - unless I'm missing something...

[JPotter]

I have the return pump, a tunze wave box, 2 tunze 6100 and 2 koralia 4 for water movement. I hope that is adequate for a 120 sps.
If the Rd is coming out with an upgrade I can wait for that. Hopefully someone will notify the list when that comes available.
Thanks for any and all help...this SW keeping has a steep learning curve.