Jennybug realizes that she doesn't have the ideal setup in that 2.5 gallon tank and is going to upgrade. The argument should have ended there. Your advice was taken and noted.
And yes, it's hard to convey in type what you're trying to say but you were a little harsh in your posts.
You've already learned how some chain store employees are not too well informed as most of us had to learn when we first started tanks. Kudos to you for saving up to upgrade to what's best for your fish and frog. Keep up with those water changes in the meantime.
Animal testing is a terrible idea; they get all nervous and give the wrong answers.