zuchinni is known for fouling filters and other equipment if left in for too long. When i feed it i leave it in for no longer than 5-6 hours and then remove it. For this reason i only feed small portions to make sure im not wasting too much of it.
Cucumber on the ohter hand can be left in for longer, 24 hours is ok, def not longer than 48 though or you will have a cloudy water bacteria bloom. Not overly dangerous but looks poor!
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