I used a 32 gallon trashcan with a mag 7. The water got
hot. Maybe 90 degrees or more with the lid on. I saw a lot of mineral deposits after a month or two. Someone said that can happen faster with warm water and that they mix water at room temp. So I am trying that now. It definitely evaporates less. Its nice that room temp is 70-75 now. If I continue this method I may put a heater in the winter to keep it at least around 70.
FYI - I did get a slow leak in the trashcan so I now use a 37g tank to mix. If I used a trashcan again I would stack two for insurance. I do that for my topoff and put a bag in between them so not likely to get any more leaks.
Any pump will have significant head loss at 7 feet. You can find charts to see what the actual
gph is at any height. I think the mag pumps have them on the box and marinedepot.com might have them online also. I am guessing this is based on using the same diameter tubing as the output?
