I have been thinking about upgrading my tanks to either 3, 4 or 5 gallons (maybe even a 10 gallon with dividers?) and adding a filtration system. HOWEVER, I had multiple tanks a long time ago and I seem to recall having a lot of trouble until the tank was established. I remember "the cycle" and I have vague memories that this was a scary and dangerous thing. Some questions...
Which size tank is big enough for the fish, yet small enough to easily clean? Is it really all that big a difference for a betta to be in a 4 gallon tank as opposed to 2.5 gallon?
Can I still do 100% water changes while using a filter or do I need to get this cycle going?
Is establishing a tank as difficult as I remember? I remember quite a few dead fish in the beginning and people telling me that was normal. I don't want to lose my bettas!
Is establishing a tank worth the trouble? Or is it just as hard to siphon the gravel and do a 50% water change once a week when you have a filter?
Any help or insight offered on this decision is greatly appreciated!