I have had my first betta, Thai in a 2.5 gallon tank for around 3 months. Then I transfered him along with his decor (gravel/river rocks & live plants and a new cave with some new rocks added) and his filter cartridge to his new 5 gallon tank. I have a new filter cartridge in there, but I also put his old one in with it to help it build good bacteria and so the tank would continue/finish the cycle. I've been keeping up the water changes and he's been in his new tank for arond 2 weeks. I did a water test today and on the ammonia, nitrite, and nitrates, and they all came up with 0 except the nitrates showed up as 5. But the test tupe had a stain on it from the previous ammonia test, and after I did the test on the nitrates, I don't know if it affected the results, so I tested the nitrates again and it showed up as 0.
So if everything is at 0, then the tank should be cycled right?
I have set up a 3 gallon tank for a new crowntail betta I got, he's in Autumn's 6 gallon WITH a divider while I cycle the new tank. I want to use Thai's old filter cartridge to help the new tank to cycle, but I don't know if I should do it now or wait a couple weeks to be sure Thai's tank is completely cycled.
If he has a new filter cartridge, but I've been using the old one to help, will it start over or mess up if I take the old one out now to use on the new tank?
I've been using a bacteria supplement along with frequent water changes to keep the levels from harming him, he is doing just fine!
Thank you for reading, and if you can help me, thank you! :D