Hello, I'm new to this forum. I spent the last few hours browsing through the threads and are loving all your wonderful photos. 
I registered because I need some help regarding 5 Oscars and a Bichir someone I know owns. They are all juveniles and live in a 55 gallon, oscars are around 3" and the bichir is 7". He is leaving for overseas soon and intends to dump them all into a reservoir.
In the heat of the moment, I told him I'll take them all in.
Now, I have a 6' by 2.5' by 2' tank (approximately 200 gallon) housing one 7" arrowana. Filtration is a 3' by 2' by 2' sump tank (25% mechanical filtration, 50% bio-media and the remaining 25% empty at the moment). I'm pretty sure my set-up is not able to accommodate everyone. How much oscars can I comfortably house in my tank, along with the bichir? I know someone who can take in 2 oscars, leaving me with 3.
If I provide additional filtration (picking up an FX5 tomorrow) and more hiding spots, can I make an arrowana, 3 oscars and 1 bichir work in a 200g? I do not intend to change tanks anywhere in the near future (the arrowana was an unexpected rescue as well and I simply do not have the space) I'm also looking at planting the remaining 25% of the sump or setting a turf algae filter there to help reduce the nitrate level.
Also, I read that oscars are aggressive towards each other when mature, so is 3 too many to keep?
Cheers!
I registered because I need some help regarding 5 Oscars and a Bichir someone I know owns. They are all juveniles and live in a 55 gallon, oscars are around 3" and the bichir is 7". He is leaving for overseas soon and intends to dump them all into a reservoir.
In the heat of the moment, I told him I'll take them all in. Now, I have a 6' by 2.5' by 2' tank (approximately 200 gallon) housing one 7" arrowana. Filtration is a 3' by 2' by 2' sump tank (25% mechanical filtration, 50% bio-media and the remaining 25% empty at the moment). I'm pretty sure my set-up is not able to accommodate everyone. How much oscars can I comfortably house in my tank, along with the bichir? I know someone who can take in 2 oscars, leaving me with 3.
If I provide additional filtration (picking up an FX5 tomorrow) and more hiding spots, can I make an arrowana, 3 oscars and 1 bichir work in a 200g? I do not intend to change tanks anywhere in the near future (the arrowana was an unexpected rescue as well and I simply do not have the space) I'm also looking at planting the remaining 25% of the sump or setting a turf algae filter there to help reduce the nitrate level.
Also, I read that oscars are aggressive towards each other when mature, so is 3 too many to keep?
Cheers!
