My LFS has two Gar's that they are calling "South American Mosaic Gars" for $24.99 each. I wanted to get one since my 150 is full of bottom dwellers. They're about 6" long. I couldn't take a photo but they look just like this, only smaller:

I asked for some general info at the store, and the guy helping me had to ask someone about it because he didn't know, and he came back and told me they said it gets three feet long. I didn't trust them based on past experiences.
Can anyone help me out? I was hoping it was something that wouldn't get far over 12"-18" for a couple years, as it would be going into a 4' by 3' by 3' (give or take a couple inches) 150 gallon for the foreseeable future (at least a year before I can upgrade) due to space issues in my current apartment.
Tankmates would include: 2x Delhezi Bichirs (4"-5"), 1x Silver Datnoid (6"), 1x Pleco (5"), 1x Jade Goby (5") and 1x Pike Cichlid [crenichla johanna] (6"). These fish currently co-exist without problem.
Tank is loaded with driftwood and plants, including high branches and tall plants. Dark substrate and caves for the fish that like them, everything natural.
I asked for some general info at the store, and the guy helping me had to ask someone about it because he didn't know, and he came back and told me they said it gets three feet long. I didn't trust them based on past experiences.
Can anyone help me out? I was hoping it was something that wouldn't get far over 12"-18" for a couple years, as it would be going into a 4' by 3' by 3' (give or take a couple inches) 150 gallon for the foreseeable future (at least a year before I can upgrade) due to space issues in my current apartment.
Tankmates would include: 2x Delhezi Bichirs (4"-5"), 1x Silver Datnoid (6"), 1x Pleco (5"), 1x Jade Goby (5") and 1x Pike Cichlid [crenichla johanna] (6"). These fish currently co-exist without problem.
Tank is loaded with driftwood and plants, including high branches and tall plants. Dark substrate and caves for the fish that like them, everything natural.