My previous Intex sandfilter & 3/4HP pump could run the Aqua Bug, but it took much longer to clean the pool.
The first SWG was a gift from a friend (still in the box, he never hooked it up last season and did not set the pool up this year), only cost me a case of his favorite brew.
I found that as we got into peak swimming season I was running 6 hours and still needed to add bleach every 2nd or 3rd day. Not wanting to run my 1.5HP pump that long I added the second SWG. The longest I ran was 5 hours each, for a total of 10 hours FC production in 5 hours time. This kept my FC at target with water temps in the high 80's and daily use. This weekend I will dial them back to 4 hours each, maybe 4hrs & 3hrs each, as the temps and use drop.
I love my SWG, and will always have one. I hope to get two more seasons out of this pool and SWG (maybe more) and will replace with a hard sided pool and proper SWG.
The Intex was bought as a 'try it out' project to see if I would truly enjoy the investment of a 'permanent' pool. I would say that all my 'upgrades' speak volumes on how much we enjoy the pool.