Do you think I will have problems? Eventualy yes since it will outgrow both bichirs in your tank
little something I found
Marbled Swamp Eel
Synbranchus marmoratus (Bloch, 1795)
Temperment Sociability Min. Tank Availability Area
Aggressive Solitary 150 gallons Common Bottom
Although technically not a true Eel, S. marmoratus is a huge fish with a long, slender body. It is a true tankbuster, and shouldn't be trusted with any fish too small to defend itself. They are diggers, and so a sandy substrate should be used, and an undergravel filter should not. They can live in poor water conditions if needed in their native habitats, and can even survive on land for quite some time with no water. The tank should be large and have absolutely gaping areas in the canopy where the fish could escape. Decorate the tank with lots of rocks and plants and feed the fish a wide variety of meaty foods. They often live in brackish waters.
Family:
Synbranchidae
Type:
Miscellaneous
Distribution:
Central and South America
Max Size:
60"
pH:
Neutral
Temperature:
75-80° F.
Diet:
Carnivorous
Breeding:
Unreported