- Have you tested your water?
- Yes
- If I did not test my water...
- ...I recognize that I will likely be asked to do a test, and that water tests are critical for solving freshwater health problems.
- Do you do water changes?
- Yes
- What percentage of water do you change?
- 61-70%
- How frequently do you change your water?
- Every week
- If I do not change my water...
- ...I recognize that I will likely be recommended to do a water change, and water changes are critical for preventing future freshwater health problems.





Hi!
I have been trying to keep fire eels for over a year now, without any luck, and I’m about to give up.
For the last year or so, I have lost around 10 fire eels. I have bought a new one everytime one have died.
After 2-3 months in the aquarium the fire eel gets a lump growing on the stomach. Its always the same type of big purple lump. When I first notice the lump, the fire eel usually dies within a week. It always grow big very quickly. The other fish I keep is healthy.
I use sand as substrate. A lot of hiding places, roots, and plants for the eels to hide.
I have have a 600 litre (158 gallon) tank.
I change 50-60% of the water ones a week, and always add Seachem Stability and Prime.
I always check to make sure that the water parameters are good.
I keep the water temperature around 26°. I feed them shrimp, frozen Brine shrimp, blood worms and frozen trout fillet. I also have my air pump running 16 hours a day.
Fluval FX4 filter that I clean every 4 months.
Yesterday another one died. I found another one dead today. Unfortunately, the last fire eel that i have, have the same type of lump growing on its stomach.
Can somebody please explain what is going on?
Other fish in the aquarium:
5 Bala Sharks
2 gold fish(not sure what kind)
5 Corydoras aeneus
1 Lesser Spiny Eel
4 Clown Loaches
2 Gibbiceps
2 Black Ghost