Swimming Pool Wall Algae Cleaning

The task is to remove Algae/Mineral Scale/Biofilm while controlling surface damage, residue carryover, brush shedding and chemical or temperature degradation.

The work happens in underwater and outdoor against algae, mineral scale and biofilm.

The part people get wrong: the residue tells you the filament, but the access opening tells you the construction. Get them in that order and the shortlist is short.

5 targets, each with its own opening, residue and contact requirement.

The dimensional envelope those targets impose on the brush:

Select hand, tube, strip, roller, disc or machine-mounted geometry from access and motion.

All disc heads on a telescopic pole, worked underwater by hand along the wall and the floor.

In practical brush terms: reach first, then residue. A brush that fits but is too soft can be stiffened; a brush that does not fit is simply the wrong tool.

Polypropylene, because it holds up to continuous chlorination and to a seasonal acid wash without going brittle, and it absorbs no water, so it does not soften underwater the way nylon does.

The constraints this application puts on the filament:

Start with medium-to-hard fill, a 60°C ceiling and chlorinated water at pH 7.2–7.8, then soften it immediately if the pool is vinyl-lined.

Work through it in this order:

1. Identify the target part and measure the access opening or clearance
2. Describe the residue: what it is, how thick it sits, and how strongly it holds
3. Choose the construction that can physically reach that target
4. Set the filament from surface risk, working temperature and cleaning chemistry
5. Fix filament diameter, free trim length and density for the contact pressure you need
6. Run one cycle and check the result before committing to a production quantity

Before you commit to a quantity, send the pool finish, the wall area, the waterline length, and the pole fitting you use.

Shock chlorination and an algaecide kill the growth so the filter can take it out, and brushing without that just moves living algae around the pool. Black algae in plaster is treated chemically at the root, and a vinyl liner will not survive the stiff fill plaster requires.

• Ordering stiff fill without stating the pool finish, which is what decides whether stiff fill is allowed
• Changing the filament while leaving excessive engagement, poor alignment or no discharge path unchanged
• Copying a worn brush without first recording its motion, direction, mounting and original working diameter

When a brush is running but not cleaning, start here rather than adding pressure: