I consider my self a reasonably experienced fishkeeper. Not amazing but Ive maintained healthy happy fish for a number of years. I have 4 tanks running with various inhabitants living happily together.
I have recently acquired a small (22litre/5gal) tank for a corner table. I have had this tank running quite comfortably for roughly 8 months with the following:
- 2 albino bristlenose (I will be moving these to one of my other larger tanks shortly but for the time being they are only approx 2-4 inches in length)
- 20 neon tetras
- 14 harlequin rasboras
- 1 male Agassiz Dwarf Cichilid
The tank is very well planted with full aquatics and has plenty of logs/caves
I have not had any issues with aggression or bullying.
My water is almost always perfect as I perform religious water changes bi-weekly of 30%
Yesterday, I went to my LFS and purchased the female Agassiz that was previously housed with my male in their display tank prior to my purchasing him 8 months ago.
As I was floating her bag, he was flaring his fins and displaying his colours, and then started literally attacking the bag. I have seen anything like this kind of aggression from him.
I released her into the tank and bagged him immediately, and kept it that way overnight. This morning I released him and they appeared to be co-existing again for the most part, and certainly chasing with less ferocity.
I am considerably worried though. I have a good relationship with my LFS and they have offered a refund if needed but I am concerned that she will even make it through the day. And she will be my first casualty in almost 6 years.
Any thoughts/advice from people in the know? I have some rams in another tank and have not had any problems remotely similar to this.