by Mark Garcia, March 12, 2019
Dealing with heavy pollen every spring is an annual battle for me, when large orchards nearby begin to blossom. For northern pools that are winterized until after the pollen season arrives, you may deal with less pollen. Most pools in the U.S. however, do not winterize and like my pool in central California, can load up with a blanket of pollen and petals. Pretty to look at, but problematic; here's why...
Besides the allergy issues, pollen in the pool can upset your pool water chemistry and clog up filtration systems.
Now before we go further, do you really have a pool pollen problem? Or is it a yellow algae growing on underwater surfaces? Pollen will usually float on the water surface, although it can and will sink eventually. It tends to gather in low circulation areas, and will 'poof' like dust when brushed. Yellow Algae however, will always be underwater, growing in spots or sheets, usually in shady or protected areas, and will not dust-up, but needs to be brushed off the surfaces.
Shocking the pool - very heavily, is the treatment for yellow algae, aka mustard algae. A triple dose shock of 3 lbs of Super Shock per 10,000 gallons is indicated, with a suitably low pH level to make the shock extra potent. Brush the pool very aggressively, with a stainless steel bristle algae brush, and then run the filter all night. The following day replace the filter media, (sand, DE grids or filter cartridge), which can harbor remnants that can regenerate at a later date.
Skimming pollen from the surface is impossible with a basic skimmer net, because the pollen just goes right through. Aside from running your filter, there are a few methods that work. Here are five ways to remove pollen from your pool.
Shocking the pool is also indicated as a treatment for pollen in the pool. A regular dose of 1 lb per 10,000 gallons will suffice to break apart the tiny particles and clear cloudy water.
To summarize, remove most of the pollen regularly with a fine mesh net or skimmer sock, and keep your tiles and skimmer inside walls clean, while running the filter a little overtime. If you need or want more rapid removal of pollen from the pool, use a Clarifier, Enzyme or Filter Aid to assist in cleaning the water faster. Shocking the pool can also remove large amounts of pollen from the pool, although it can result in cloudy water in some situations.
The best part is - it's usually temporary! In a couple of weeks, the pollen will be gone. :-)
Thanks for Reading;