Hi -- fairly noobish, and I'm at a loss for what went wrong. I've had a betta in a small bowl for 2 years, and decided she needed a new home. Picked up a 3.5 gallon fluval set-up, added rocks and a few live plants, a heater, and let it cycle for a few weeks. She was super happy.
My five year old wanted to give her some company, so did a bit of research on what could co-habitate with bettas, and decided on a dwarf african frog and some shrimp to keep things clean. Started first with the frog, and they got along great; even hung out on top of each other.
A week or so later we decided to add the shrimp. I picked up 2 and while there noticed the shop had a tiny half-bill (pinner ~3/4 inch) that the guy said shouldn't be an issue and didn't get any bigger. Here's where things went wrong.
I added the two shrimp and half-bill. Three days later, my betta was dead. then a shrimp about 4 days later. then the halfbill the next day. then a day after that (today), the other shrimp. I'm left with the frog (for now).
I tested the water after the betta died:
temp: 78 deg
Then again after the first shrimp:
temp: 81 deg
The only other thing I can add:
- I've been feeding them daily, but I think the right amount.
- When adding the shrimp/halfbill, water level was down ~1 inch so I added the water from the bags they were in -- mistake?
- fluval says to change one of the two filter cartridges every two weeks; since these are hard to find I haven't done that yet, but assumed since the water was testing OK wasn't necessary yet -- mistake?
- last thing, the water just over the past few days has started to look greenish, I assume from the plants. Does that mean anything?
Any thoughts would be appreciated -- I'm really bummed, esp about the betta which we've had for so long, and hesitant to start over when I don't know what happened.