Notes from the deep end

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

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30 articles

Skimmer Equipment · Archive date: · 3 min read

What Is the Purpose of a Skimmer Sock and Is It Worth Using?

Pool skimmer socks can catch fine debris before it reaches the skimmer basket and pool filter. They are often worth using if you want easier cleanup.

Written for PoolSkimmer on Oct 7, 2026; assigned an earlier archive date, not published on that date.

Water Chemistry · Archive date: · 3 min read

When Should You Retest Pool Water After Making a Correction?

Retest pool water only after it has fully circulated and the correction has had time to work. Timing depends on the change, the pump, and water clarity.

Written for PoolSkimmer on Oct 7, 2026; assigned an earlier archive date, not published on that date.

Filtration & Circulation · Archive date: · 3 min read

Why Air Gets Into a Pool Pump System—and How to Fix It Safely

Air in a pool pump system usually points to a suction-side leak, low water level, or a lid seal problem. Start with safe checks and know when to call a pro.

Written for PoolSkimmer on Oct 7, 2026; assigned an earlier archive date, not published on that date.

Seasonal Pool Care · Archive date: · 3 min read

How to Close an Inground Pool for Winter: A Step-by-Step Guide

Close an inground pool by cleaning it thoroughly, checking equipment, following the manual for water level and plumbing, and securing a winter cover before freezing weather.

Written for PoolSkimmer on Oct 23, 2026; assigned an earlier archive date, not published on that date.

Pool Troubleshooting · Archive date: · 3 min read

Is Black Algae in Your Pool Dangerous?

Black algae is usually a sanitation warning, not an immediate toxin threat, but it can make a swimming pool slippery, unsanitary, and unsafe to use.

Written for PoolSkimmer on Oct 23, 2026; assigned an earlier archive date, not published on that date.

Pool Troubleshooting · Archive date: · 3 min read

What Does Mustard Algae Look Like in a Pool?

Mustard algae usually looks like a dusty yellow, tan, or yellow-brown film on walls, steps, and fixtures that brushes away but often returns.

Written for PoolSkimmer on Oct 23, 2026; assigned an earlier archive date, not published on that date.