So a few days ago I'm thrilled with my new red lotus. Today watching the betta--I ask my son, "Does the betta's tail look a little ragged to you"? He's a half moon and it didn't look like this before. My son says yes, it does. Great, I assume he's got fin rot, need to get meds. And oh yeah, doing good water changes to ensure he's in clean water. Depleting beneficial bacteria in the 30g. for TOO good of maintenance after doing what others told me to do: big water changes. I'm angry and discouraged.