I've done it that way for 4 months and never have a problem until I tried a different wayOooops, we've all done it......that's part the reason I pump my water in now rather that tipping my water via a 5 gallon drum.
I do like them. CheersMonte sp Carlo http://tropica.com/en/plants/plantdetails/Micranthemum'MonteCarlo'(025TC)/4442
You could try that.
hoggie