sand filters

[t-man]

thanks janet

[aylad]

Yes, backwashing will take out anything that made it past the baskets. Just make sure that you backwash until you're getting clean water, then move it to "rinse" and turn it back on for a minute or so to rinse all the backwash water out of the pipes before turning the pump off and switching back to filter. If you skip the rinse cycle, any backwash water still left in the pipes will blow into the pool and make a mess.