BlazerFRS said:I wouldn't simply pinch the return line; depending on it's design backpressure could damage the pump.... if I was going to mechanically reduce flow like that I'd probably do it on the input line FWIW
The AC 50 would be would be filtering your entire tank volume about 7x per hour; the reccommended is usually 5x-10x so you should be good with that. If you're planting you'd usually want to stay closer to that 5x anyway