You must make a series of decisions for your next sump order to meet your specific needs. The following Q&A should help cover most points, but feel free to ask me for additional help via email if you wish.
How large should the sump be?
The bigger, the better. The larger your sump, the more water volume you’ll be adding to the total system, plus it will be able to hold excess water during a power (or pump) failure. No floods equals no wet flooring!
How do I decide the size?