Notes from the deep end

Practical articles for pool owners on skimming, water testing and choosing the right equipment.

Clear filters

8 articles

Filtration & Circulation · Archive date: · 3 min read

What Is the Best Pool Filter Sand?

The best pool filter sand is the exact filter-grade sand your manual specifies. Match the model’s media requirements, keep the tank clean, and replace sand only as directed.

Written for PoolSkimmer on Oct 24, 2026; assigned an earlier archive date, not published on that date.

Filtration & Circulation · Archive date: · 3 min read

Why does my pool pump keep losing pressure?

A pool pump that keeps losing pressure usually has a flow restriction, an air leak, or a filter problem. Start with water level, baskets, and the filter.

Written for PoolSkimmer on Oct 24, 2026; assigned an earlier archive date, not published on that date.

Filtration & Circulation · Archive date: · 3 min read

How Much Sand Does a Pool Filter Take?

The amount of sand depends on the exact pool filter model, not just the pool size. Check the tank label or owner’s manual before adding media.

Written for PoolSkimmer on Oct 24, 2026; assigned an earlier archive date, not published on that date.

Filtration & Circulation · Archive date: · 3 min read

What Pressure Should a Pool Pump Run At?

A pool pump should run at your system’s clean-filter baseline, not one universal PSI. Compare the gauge to that normal reading and watch for changes in flow.

Written for PoolSkimmer on Oct 24, 2026; assigned an earlier archive date, not published on that date.

Filtration & Circulation · Archive date: · 3 min read

Can You Use Play Sand in a Pool Filter?

Play sand is usually not a safe substitute for pool filter sand. Use only the media your filter manual allows, or you may get poor flow, channeling, or cloudy water.

Written for PoolSkimmer on Oct 24, 2026; assigned an earlier archive date, not published on that date.

Filtration & Circulation · Archive date: · 3 min read

Why Is My Pool Filter Pressure Low?

Low pool filter pressure usually points to a flow problem upstream of the filter, such as low water level, basket clogs, air leaks, or a pump issue—not a filter that is “too clean.”

Written for PoolSkimmer on Oct 24, 2026; assigned an earlier archive date, not published on that date.

Filtration & Circulation · Archive date: · 3 min read

How does a DE pool filter work?

A DE pool filter traps fine dirt on coated grids inside the filter tank, then is cleaned and recharged after backwashing so water can keep moving freely.

Written for PoolSkimmer on Oct 24, 2026; assigned an earlier archive date, not published on that date.

Filtration & Circulation · Archive date: · 3 min read

What Kind of Sand Do You Use for a Pool Filter?

Use the sand your pool filter manual specifies, usually clean pool filter sand—not play sand, beach sand, or masonry sand unless the maker allows it.

Written for PoolSkimmer on Oct 24, 2026; assigned an earlier archive date, not published on that date.