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That was my understanding that they do still run the larger pumps...
Water still in good shape 3+ months out from initial fill after 3 weeks of no treatment while out of town. Plan to do a refill soon only because it will soon be 4 months but don't really seem to be having any water issues that are forcing my hand at present.
Thats impressive for a newbie, it was my third fill or so before I could make those kinds of claims. The fact that your water looks good is a real tribute, but go ahead and change again sometime soon. Chances are, while still looking good, you might have forgotten just how new water looks and feels. When 3 or 4 month old water does go bad, it goes bad in a hurry, so changing now on your terms will prevent you from having to change when other things, like a sudden trip away from home. I think you said you live southern US, but I always try to change the water in late July so that it is due again in late October, which is the latest time of the year when I can count on still using my outside hoses.