Equipment failures can very quickly lead to a green swimming pool. If you have a clogged filter or a problem with your swimming pool's circulation system, it's important to have it repaired as soon as possible.
Vacant homes or those whose swimming pools have been neglected for a while often have green swimming pools.
Other times, even swimming pools that have been well cared for can suddenly start to turn green. This is more likely to happen if your filter is on the smaller side (we see undersized filters a lot), when swimming pool pumps are on for an insufficient amount of time (you should plan to turn over your entire swimming pool twice each day - click here for a calculator), or when your swimming pool equipment or pool surface starts to age.