Beckett Air flow:

Here is a test chart of air flow, as driven by a 1/12hp Sequence 3600.

Pumps and Pump supplies:

Suggested pumps for my skimmers:

• SK1020: Mag 18 or Mag 24
• SK1220, 1620: Iwaki 55, LG4MDQ-SC, Sequence 3600
• SK4020, SK5020: Iwaki 55, Iwaki 70, LG4MDQ-SC, Sequence 3600
• SK4220, SK5220: Iwaki 100, Sequence 5200, dual Iwaki 55
• SK8020: Dual Iwaki 70's, or dual Iwaki 100's, depending on your tank size.

Sequence:

Three year warranty, Salt water seals and hardware. Direct drive. The 750 series works great for closed loops, or as a tank return. They are not high-pressure pumps, so don't run the skimmers well. I have run a 3600 on a SK5000, and it runs, but not as well as an Iwaki 55 does. These are very quiet pumps.

750 Series:

• wp-MT3000SEQ11-XSX-SW, 1/8 HP, 2750 gph @ 2', 22 lbs:
• wp-MT3600SEQ12-XSX-SW, 1/8 HP, 3300 gph @ 2', 22 lbs:

1000 series:

• wp-MT2900SEQ10-XSX-SW 1/8 HP, 2590 gph @ 4.4'. 22 Lbs:
• wp-MT4600SEQ22-XSX-SW, 1/6 HP, 3200 gph @ 8', 28 lbs:
• WP-MT5200SEQ22XSX-SW, 1/4 HP, 4000 gph @ 11', 29 lbs:

Little Giant:

One year warrantee from Little Giant, 115V/60 Hz, inline use only. Magnetic Drive.

• 3MDQ-SC: 1/15 HP, 0.8A, Inlet=3/4", outlet=1/2"
• 4MDQ-SC: 1/10 HP, 1.3A, Inlet=1", outlet=1"

Iwaki:

One year warrantee from Iwaki, 115V/60 Hz, inline use only. Direct Drive.

• MD-55RLT: 1.6A, Inlet=1", outlet=1"
• MD-70RLT: 3.0A, Inlet=1", outlet=1"
• MD-100RLT: 3.4A, Inlet=1", outlet=1"