I got a micro system out of are local No Frills/Focus last year worked good for a while then the drippers started clogging upwitgh algea. It has a filter, the butts are filled from the GH roof and tap (as I'm still to put the gutting on the shed) so not sure if its mucky water or the slow drip rate that allows the algea to from, thinking of upgrading the pipe to half inch see if that makes a diff this yr.