get yourself some 1/2'' tubeing a 90 deg. 1/2 barbed fitting,and a 1/2'' rubber gromet,drill the right size hole for the gromet push the fitting into the gromet stick on your tubing and your done.make sure to drill the hole the right size you want the fitting to be a little tight going in so it wont leak.now you have a nute level gauge and a drain.just turn it down and drain,just a little advise,I use milk crates to elevate my plants it makes it much easyer to take care of them. draining the buckets at floor level is a pain in the ass.good luck