Which Fish Is Hardier?

[vancouver]

Just like the title says.. which are hardier? I'm thinking of using either to cycle my 75g tank. I'm going to get 15 of either.. Or I guess I could get 9 and 9.. but would rather get 15 of 1 type..

So who would stand the better chance of surviving a cycle.. The filter has already been seeded, and I will do water changes enough so the cycle wont be horrible.. but I'd like whatever I get to survive.. so which are hardier?

Thanks!! 8)

 

[The-Wolf]

I wouldn't recomend doing a fish cycle period.
search the forums for fishless cycle