your right, and i don't want to argue. it might not happen. might not. or, it will happen. the thing is, my parents are seperating, so my dad is living here (the original house), and my mom is moving out. i saw an auction on ebay for an 8x2x4 tank with filteration for 100 bucks (it was one of the tanks that they have at fish stores). my mom says not until everything with the seperation is sorted out, but the auction was only up for 3 more days

. so i told my dad about it, and asked him if we could build one once everything was settled. he said sure, so i got excited. very excited.
if we do build the tank, it could happen as soon as early March.
the reason i got kinda mad was because i knew that you were right, and my parents do sometimes say things that they don't mean. i just have a good feeling about this one
now back to the original topic. i read about arowana compatibility, and found that they don't do so well in groups. i didn't know that because i always figured that they got along well with each other because of all of the aro communities that i have seen on youtube and stuff. so maybe, if the tank happens, i will get one silver aro, 2 clown knives, 2 cichla, and 2 other large cichlids. maybe add a gar or something.
if the tank happens, i think i am going to buy the aro about a week into building the tank, so that it has a chance to get some size on it before i add the cichlids. should i do the same with the knives? how fast do aros and clown knives grow? i don't want a foot long knife in my 35 for too long

.
thanks for the help guys, and the reality check