Fire eel tankmates

Bret11

Jack Dempsey
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Oct 10, 2018
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Best tankmates for a 15 inch fire eel and a 9 inch black ghost knife in a 125 gallon tank.
 

Fish Tank Travis

Potamotrygon
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Feb 28, 2016
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Dayton, OH
Tank will already be overstocked with those two fish. The fire eel can reach up to 40” and I know the BGK can reach a pretty large size. Truly, that tank is too small for the fire eel, but I’m not as familiar with the BGK.
 

Bret11

Jack Dempsey
MFK Member
Oct 10, 2018
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I know. I am planning to get a 250 gallon in the future but what would be good with them for now.
 

Bret11

Jack Dempsey
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Oct 10, 2018
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Ok. What if I got a fire eel that was 9-10 inches with the 9 inch black ghost knife. Would that be better.
 

Fish Tank Travis

Potamotrygon
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Feb 28, 2016
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Ok. What if I got a fire eel that was 9-10 inches with the 9 inch black ghost knife. Would that be better.
It will still only take the fire eel less than a year to be pushing 18-24”, so unless you plan on upgrading in the next six months, I recommend you hold off on getting another fish.

I will say that with enough water changes, you might get away with adding another fish, but we are talking around a 90% water change at least once a week, maybe twice, and then depending on the type of filter, it may need cleaned out once a week.
 
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RemainVayne

Plecostomus
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Sep 26, 2017
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It will still only take the fire eel less than a year to be pushing 18-24”, so unless you plan on upgrading in the next six months, I recommend you hold off on getting another fish.

I will say that with enough water changes, you might get away with adding another fish, but we are talking around a 90% water change at least once a week, maybe twice, and then depending on the type of filter, it may need cleaned out once a week.
I have a medium BGK and a black spotted eel, along with more, in a 150 and I'm doing 75% changes 2x a week to keep things in check. Don't push it with the 125g where it becomes too much of a chore for upkeep where you slowly stop.
 
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