Boyu · Water / return pump
FP Series Submersible Pump
- Flow
- 300–1,350 L/h
- Power
- 5–19 W
Adding gentle, spread-out circulation to a medium tank or powering a simple internal filter.
4 models
SunSun · Water / return pump
SunSun CTB Frequency Pump
An efficient pump range from 2,500 to 7,000 L/h, suited to sumps and filter feeds. Six sizes.
Updated
2,500–7,000 L/h15–70 W6 models
Will it suit my tank?
litres
Best for
Mid to large sump returns.
What stands out
- 2,500 to 7,000 L/h
- 15 to 70 W
- Up to 5.6 m head
- 5 m cable on larger sizes
Models and specs
| Model | Flow | Max head | Power | Dimensions (L × W × H) | Outlet adapters | Cable |
|---|---|---|---|---|---|---|
| CTB-2500 | 2,500 L/h | 2.5 m | 15 W | 15.5 × 9 × 12.7 cm | 20/25mm | 2.5m |
| CTB-3500 | 3,500 L/h | 3 m | 20 W | 15.5 × 9 × 12.7 cm | 20/25mm | 2.5m |
| CTB-4500 | 4,500 L/h | 4.5 m | 40 W | 15.5 × 9 × 12.7 cm | 20/25mm | 2.5m |
| CTB-5500 | 5,500 L/h | 4 m | 45 W | 17.8 × 10.3 × 15.1 cm | 20/25/32mm | 5m |
| CTB-6500 | 6,200 L/h | 4.8 m | 55 W | 17.8 × 10.3 × 15.1 cm | 20/25/32mm | 5m |
| CTB-7500 | 7,000 L/h | 5.6 m | 70 W | 17.8 × 10.3 × 15.1 cm | 20/25/32mm | 5m |
Figures from the maker's published specifications. Makers revise products, so check the current figures before buying. Photos supplied by the brand or its distributor.
Compare with
Browse all pumps
Boyu · Water / return pump
PGB Series Submersible Pump
- Flow
- 740–1,565 L/h
- Power
- 12.5–28 W
Undergravel plates, sump returns or DIY top filters that need decent head in a narrow space.
3 models
Boyu · Water / return pump
SP-100 / SP-101 Series Powerhead
- Flow
- 300–1,850 L/h
- Power
- 4.5–35 W
Anyone needing a cheap general-purpose pump for circulation, a DIY filter or a small sump return.
9 models
Boyu · Water / return pump
SP-1000 Series Submersible Pump
- Flow
- 300–1,400 L/h
- Power
- 8–34 W
Small sump returns, DIY filters and general water moving jobs around the fish room.
5 models
Frequently asked questions
Quick answers about the SunSun CTB Frequency Pump, drawn from its specs.
Who is the SunSun CTB Frequency Pump best for?
Mid to large sump returns.
What are the alternatives to the SunSun CTB Frequency Pump?
Other pumps worth comparing: Boyu FP Series Submersible Pump, Boyu PGB Series Submersible Pump, Boyu SP-100 / SP-101 Series Powerhead. Add any of them to the compare table to see the specs side by side.
What sizes does the SunSun CTB Frequency Pump come in?
6 options: CTB-2500, CTB-3500, CTB-4500, CTB-5500, CTB-6500, CTB-7500.
How do I compare the SunSun CTB Frequency Pump with similar products?
Tap Compare on this page and on any other pump you are considering, then open the compare table. It lines up every published spec side by side and lets you pick the size of each product.