Bumb .anyone any ideas how i can get round this flush while under the scrog.i am using 4 gallon pots that are sitting in 12inch by 12 inch trays that are 6 inch deep .any ideas would be great,heres a pic and you can see the trays they have holes 3 inches up for ventalatoin so when flushing i would need to get the water from the trays before it floods the place dont have a pump so any ideas will help.the postman.