Thanks Rosehawke and Wasserpest.
I was thinking of making enough solution (volume and strength) to cover a week and a half and then dose for the week. I can use the leftover, as you say, for a gap dose. Great idea and great plans. Will be implimenting on Monday!
Thanks for your great posts and for the welcome.
55 gallon, 2x65 CF, Hagen Co2, Seachem dosing