Okay - the 50% water change yesterday pulled the Nitrates down to 40
PPM today.
Should I do another water change to drop them further ?
AND !
How do I proceed ? Current plan is to give the 5 gallon to my daughter (red
betta), and put up the 10 gallon in the boys room, divided (blue betta + 3rd betta). The 6-gallon will stay in my room.
Option 1 : Get 3rd betta, put it in the now cycled 6-gallon. Let the other tanks finish their cycles with fish in them.
Option 2 : Move Blue Betta from boys 5-gallon into the cycled 6-gallon. Cycle the 5 gallon fishless.
Option 3 : Move Red Betta from my daughter's 1-gallon into the cycled 6-gallon. Ditch the 1 gallon (hospital or quarantine tank use in the future). Let the 5-gallon finish a cycle with fish.
Other options welcome.