A system that worked wel for me was:
1) 5 gal homedepot bucket+lid $3
2) few mini net pots might be 1.5"?
3) Cheap waterfall pump from home depot $15
4) i think its 1/4 in rainbird semi hard plastic tubing also from home depot $5
5) T that fits in tubing_25 cents
make a circle around the inside of the pot with trhe tubing and connect with the "t" fit it snuggly for better support (as close to top of bucket as possibe)
6) tube runs from bottom of T to pump
7) drill holes with small drill in circle of tubing so holes drilled face inside of circle 8-10 will do
fill bucket 1/3-1/2 way with water phd to 5.5
9) drill several holes in the lid for net pots_3-10
circular hoop sits well above water ,and the pump should run 247 and push water out the inside of the center spraying bottom of all net pots-
Bam cloner for $30 (i have used same method with one large hole in lid and it produces the largest mother plants at the fastest rate i have ever seen,bark!)
Sidenote-change water 1ce a week,