Its tough to beat the pondmaster ap-100. Its rated at 9150 cu.in. / minute.
9150 / 1728 = 5.3 cu.ft / minute
The eco linear only 1.8 cu.ft. / minute.
It moves less than 1/2 the air and cost $100 more. They sell the 1.8 cu.ft. pump for 3000-8000 gallon ponds, makes you wonder if 5.3 is overkill for 200 gallons. Or if i'm not comparing them right.
The deluxe linear is 2.8 cu.ft/min. and its rated for up to 20,000 gallons. They claim is almost silent but it would cost you $677. And you need two of them to match the ap-100.
I know there is a max amount of oxygen you can put into the water, i dont see many people that monitor it though. I havent heard anyone complain about the pondmaster pumps.