If I don't my water gets really murky and gross. Plus, I'm soo worried about her getting sick because I've been seeing white spots all over her tank. Her old tank was 1.75 which was toooo small for any beneficial bacteria to emerge. For her new 2.5 gallon every 3 days will do(:
Actually, her water needs to be changed. It's SUPER hard already, and the longer it sits with her substrate, the harder it gets. It just soars. And it makes the tank get those white marks and crap. She also gets extremely lathargic if I don't clean it. I don't change her filter media often, so the bacteria stays there. And most water changes I don't scrub everything down just rinse the rock and the inside of the tank(: The plants (live & fake) are generally left alone.
I also get her used to her new water. Generally because the pH is different, the water temp is off by a couple degrees, and it's less hard. It'll take me 30 mins usually to transfer her in. And every time I change it (except for last b/c her plants are in there QTing) I put her into a .75 gallon bowl with some decor from her tank(:
Kaida- CT Female 2.5 Gal.
Julep- HMPK Male 2.5 Gal.
Fandango-HM Male 10 Gal.