Name: SOBO Power Head Pump – High Flow Aquarium Water Circulation (WP-1880 to WP-4880)
Brand: SOBO
SKU: SOBO-PH
Availability: InStock
Rating: 4.44 (16 reviews)

Question 1

What is the difference between a powerhead and a regular submersible pump?

Accepted Answer

A powerhead is designed specifically for water circulation and oxygenation — its impeller and outlet are optimised to produce a strong, directed stream of water through the aquarium volume. A general submersible pump (like the SOBO WP-3200/3400 series) is designed to move water through filter media with moderate to high head pressure capability. Powerheads typically produce higher flow rates at lower head pressure, which is exactly what open-water tank circulation requires. For running a canister filter or sump with head pressure (water being lifted upward through pipes), use a standard submersible pump. For creating water movement and current across an open aquarium, a powerhead delivers better performance.

Question 2

How many powerheads do I need for my tank?

Accepted Answer

For tanks up to 150L, a single appropriately-sized powerhead positioned to create a circular flow pattern is usually sufficient. For tanks 150–300L, two powerheads on opposite ends angled toward each other (offset slightly so they do not directly oppose and cancel each other) provides much more even circulation with no dead spots. For very large tanks over 300L and reef aquariums, two to three powerheads distributed at different heights and positions is the standard approach. A useful check: after positioning, observe fine particles (food or decorative sand) in the water column — they should circulate across the full tank without settling in corners or behind decorations.

Question 3

Which model is best for a reef aquarium?

Accepted Answer

For reef aquariums, the choice depends on tank volume and the type of corals you keep. Soft corals and LPS corals generally tolerate moderate flow — a single WP-2990 (2800 L/h) for a 150L reef or a pair of WP-1880/WP-2880 units for distributed flow. SPS corals and high-flow species require significantly more movement — a WP-3990 (3800 L/h) or the WP-4880 (5000 L/h) for larger SPS reef setups. The key for reef circulation is varied, non-laminar flow that simulates natural wave action rather than a constant direct blast — position powerheads to create indirect circular or reflected flow patterns across coral frags rather than pointing directly at specific corals.

Question 4

Is the SOBO WP-4880 suitable for sump return?

Accepted Answer

Yes — the WP-4880 at 45W and approximately 5000 L/h is appropriate for sump return applications in medium to large reef and freshwater systems. For sump return, the relevant specification is flow rate at the specific head height (the vertical distance water must be pumped from the sump to the display tank) — the actual flow delivered will be somewhat lower than the rated maximum due to head pressure losses. For a sump with 60–80cm head height, actual WP-4880 flow at that head is typically 3000–4000 L/h, which suits display tanks of 300–500L. For larger systems or very high head heights, a dedicated sump return pump rated for higher head pressure may be more appropriate.

Question 5

How loud are SOBO powerheads in operation?

Accepted Answer

SOBO powerhead pumps use a ceramic shaft impeller design which reduces vibration and noise compared to standard shaft impellers. A clean, properly maintained SOBO powerhead in good condition operates at a low hum that is generally inaudible from 1–2 metres away in a typical home environment. Noise increases with the model size — the WP-4880 at 45W produces more noise than the compact WP-1880. The most common cause of excessive pump noise is debris in the impeller housing or a worn ceramic shaft — a grinding or rattling noise indicates a maintenance issue rather than normal operation. Clean monthly and inspect the ceramic shaft; a quiet pump indicates a well-maintained pump.

Question 6

Can I use a powerhead in a tank with small fish or fry?

Accepted Answer

Powerheads generate strong directional water flow that can be harmful to very small fish and fry. For fry tanks, nano fish (Ember Tetras, Chili Rasboras, nano gobies) and slow-moving fish like Bettas: use a sponge filter or a standard low-flow submersible pump rather than a powerhead. If you need to add a powerhead to a tank with small or delicate fish, diffuse the flow by aiming the outlet at a wall, large rock or the water surface (for oxygenation rather than current creation) and use the lowest practical flow setting. The WP-1880 at its minimum effective output is the most manageable powerhead for sensitive applications.

Question 7

What is the WP-1990 useful for compared to the WP-1880 and WP-2880?

Accepted Answer

The WP-1990 at 15W and approximately 1500 L/h sits at the lower-power end of the standard series. Its primary advantage over the compact WP-1880 (20W, 1800 L/h) is lower power consumption at a comparable price point — useful for aquariums running 24/7 where power cost matters over a multi-year period, and for planted tanks where very gentle circulation is needed (high flow powerheads can uproot foreground plants and create surface agitation that strips CO2 from injected systems faster than ideal). The WP-1990 standard series body is also slightly different in design from the compact series, which some aquarists prefer for aesthetic or mounting reasons in their specific setups.

Question 8

How do I create the best circular flow in my aquarium?

Accepted Answer

The most effective circular flow pattern uses the powerhead outlet aimed parallel to the long axis of the tank, positioned on one short wall, with the outlet angled approximately 15–20 degrees toward the center of the tank (not directly along the glass). This creates a flow that travels across the full tank length, bounces off the opposite short wall and returns along the opposite side as a weaker return current — a complete circulation loop. For large tanks, two powerheads on opposite short walls angled toward each other but slightly offset vertically (one high, one mid-tank) creates a rotating figure-of-eight circulation that eliminates all dead spots. Observe floating food at feeding time to verify there are no stagnant zones where food settles and sits uncirculated.

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