Be sure your rain barrel incorporates a filter screen and that the birdbath agitates the h2o; DIYers can incorporate a mild trickle to a traditional model by rigging it up by using a fish tank pump and some plastic tubing. It is best to look out for any scale infestation, https://cody0lubj.alltdesign.com/the-smart-trick-of-how-to-combat-insects-in-jizan-that-no-one-is-discussing-50611882