Support answer · Using Your Robot
My Dolphin robot came with 2 sets of filters. Which filter should I use?
Short answer: Use fine mesh filters for the first cycle of the season, then switch to ultra-fine filters for smaller debris.
Based on Maytronics support, updated 2025-11-26, rewritten by Poolbots' pool experts. Parts that fix it are below.
The answer
What to know.
Basket filters
Super Filtration combines a multilayer ultra-fine filter with a pre-filter for filtration at 30 microns.
Cartridge filters
Your Dolphin arrives with fine (mesh) filters already installed. These catch larger debris, including leaves, grass, and twigs. Use them for the season's first cleaning cycle.
Depending on the model, your robot may also include pleated ultra-fine filters made of corrugated paper. These ultra-fine filters capture small debris up to 50 microns, including dirt, sand, and algae.
Some models have an extra spring filter that fits into the ultra-fine filter basket to provide super filtration at 30 microns. Review the filter kit details and model compatibility.
Check your robot's user manual to confirm which filters are included.
When to switch filters
After completing one cycle with the fine filters, switch to the ultra-fine filters if your model includes them.
Starting with ultra-fine filters can cause them to clog sooner, depending on how much debris is in the pool. You may need to clean them a few times during that first cycle.
How to change the filter panels
If you have a different filter type, follow the installation directions in your robot's user manual.
Source: Maytronics support. Same steps and facts, rewritten for clarity; the videos and illustrations are Maytronics' own.
Replacement parts
Parts that fix this.
This answer comes down to filters. The exact part depends on the model: choose your robot and we open its parts list, or browse the category for every model.
Browse by category:Filters All genuine Dolphin parts →
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