Pet Detective
New member
I do 10g water changes every week on my 75g tank, would the 75g per day unit be ok over the 150g per day? I know it depends on your water pressure but on the average how much water can you really make and does it really take a long time?
The only difference between the units is the membrane, 1 is rated 75gpd, the other is 150gpd, buy the cheapest unit & you can always upgrade your memnbrane, although 75gpd is the best all around membrane for waste to zero tds water ratio.