Hey there.. I dont have a bottom drain on mine and although I do wish I did, I make out good.. I just have to vacuum the bottom of mine but not very much.. surprising I get very little on the bottom and so far I dont have any green water, never have, not even spring start up.. not sure why I dont, I just know some day I will wake up and experience it. I have two biological skippies which I have yet to touch, this will be there 3rd year. just trying out the method of not ever cleaning it will see how it goes as it ages. I also have a DIY filter on my pumps before they hit the skippy.
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