No one wants green, black or mustard algae floating around in their home pool, which is why algaecides are a popular and recommended chemical for pool owners. However, using the wrong algaecide can result in something else on the surface of your pool: foam.
To save money, many families opt to use cheap, low-grade algaecide in their pool. Unfortunately, along with being poor at keeping algae at bay, these chemicals also produce surface foaming.
To prevent this type of foam, make sure you check the label of your algaecide. In general, you should avoid low-cost options that only contain 10% polymers. Algaecides with 30% to 60% polymers and copper-, silver- or gold-based algaecides are all better, non-foaming choices.
If you must use cheaper, foaming algaecides, you may be able to reduce how much of the chemical you need to use by making sure you have a strong pool pump that's in good working order. Pool pumps ensure water doesn't sit idly. They also filter out contaminants, reducing the risk of algae growth.