Snook000;4711467; said:
my fish store screwed me and i paid $100 each for both of them and one of them has been running for 3 year. my water is never crystal clear
After 3 years it's definitely not running at full potential unless you took excellent care of them, you're lucky if you still have the original impellers, IMO. I like them, but I don't trust the 90g rating on my 400s at all.
It's your job to do the research on your equipment to avoid getting screwed. My boss at the LFS would sell you a doorknob as a rare snail if he could convince you..
However, you seem REALLY unsure of what you want and how to go about caring for the fish you think you want on a given day. You have a 55 and low filtration for a predator, there isn't much for big fish you can cram in there. Yet here you are asking about oscars, exodons, dats, pike, EBJD, pickerel, knives, why your bichir died, anything that will "tear up feeders" and even about possibly turning yor tank to salt, and that's just the past MONTH!
Also you frequently refuse good adivce and ask questions then turn right around and tell people they are wrong and even argue with them but still expect help.
I think you should pick some SMALLER fish, something that will not overstock a 55 on it's own since you seem to want multiple fish. Until you have the ability to buy the proper equipment as needed, the potential to upgrade for some of the larger fish you want as they grow, and the maturity
take the advice you
ask for if it isn't the exact thing you wanted to hear. Sorry if that sounded mean, I mean it in the nicest way possible.
Really, I'd love to see you finally settle on a cool fish and take care of it but you change your mind every day it seems and just want big-mean-kills stuff-no effort or investment required..
Maybe a few good books on some popular families of fish would help? Something on gars, something on cichlids, ancient fish, etc. Then you'd have a reference on hand for general sizes, diet, water preferences, aggression level, possible tankmates, etc.