The gamma has a strong
PVC construction i think its the best choice. I wouldn't put more than 100-150
gph through it so any pump rated for that flow. I only put about 200gph through my 25W so 100-150gph should be a good flow for u. Remember the more time the water is in the
UV the more effective it is. A small mag drive will get the job done fine, just check the
gph on it.