Hello, I'm a new (beginner) betta owner, and need help! My daughter won "Ruby" at her school carnival and I've been overwhelmed trying to get educated and set everything up.
Ruby is temporarily in a 3g Petco pet keeper plastic tank right now while I figure out how to fishless cycle a 5.5g permanent home. I live in southern CA where the weather is warm, but I read I still needed to get a heater.
I bought a Tetra submersible heater that auto-adjusts to 78 degrees. I tried it in the larger tank and it fluctuates depending on the time of day between 78-82 degrees. Is it safe to put this heater in the interim tank with him in it already? I'm not sure if I am supposed to take him out, heat up the tank first and float him in a bag or something else until he acclimates or if it's okay to put the heater in with him because it will gradually warm up and he will acclimate as it does? Is it unhealthy for there to be this fluctuation of temperature over the day?
After reading here, I'm wondering if this was a bad, cheap heater to get and I should invest in an adjustable one. Do those automatically shut off too when it gets to a certain temperature? Do you have a recommendation of something better for the 5.5g tank? Also as summer temperature rises, I'm wondering if I am supposed to leave the heater off.
Thanks in advance for your help!