22g is roughly 80L a min with a 25mm hose, don't think i need that much flow as i'm only changing 120-150L. So if i went with a 5000lph pump, with 20m of garden hose with an ID of 11mm do you think this will still work ok, or would it be to much strain on the pump, not to worried if it takes 10mins or so to refill. Was thinking bout something like this as it comes with a few adaptors for hose thickness
http://www.trademe.co.nz/Browse/Listing ... =573056005