Poolmate Hydro 4

Advantages

• ✓Hydro 4 provides both corded and optional battery operation, whereas Dolphin entry models are typically cord‑only
• ✓Larger 4.1 L filter basket and 320 L/min flow rate give longer cleaning intervals than Dolphin’s smaller filters

Disadvantages

• ✗Hydro 4’s price point may be higher than basic Dolphin units that offer sufficient cleaning for smaller pools

Advantages

• ✓Hydro 4’s Wi‑Fi/Bluetooth app with scheduling and custom modes outperforms Aiper’s limited remote control options
• ✓Dual‑stage filtration and patented waterline jets give superior algae removal compared with Aiper’s single‑stage filters

Disadvantages

• ✗Aiper models are generally lighter and may be easier to handle for very small above‑ground pools