Others may say something different and I haven't read the whole post yet but let me tell you my whole life changed with making my own water honestly it seems overwhelming at first and maybe expensive, but it is the best way to go and overall less expensive when you factor in water quality and the salt mix plus your time to get it haul it home, you can make a mobil 5 gallon water changing kit on wheels and store it in a closet. You can make quality water on demand. I make 5 gallons in 26 minutes, the filters last forever if you do more searching and put the possibility of making your own water in your options you may change your life too! Thats my thoughts on yoursOur local store offers pre-mixed salt water for $1 a gallon (and RO water for $0.50). Given that I am running a 10 gallon nano here, I think it might be a good idea to buy the salt water from them instead of mixing it myself. I use distilled water for top offs.
Seems like the large volume of water they have should make it more consistent, which is key. Any reason why I should not buy pre-mixed water from the store?