White Cloud Mountain Minnow?

I am setting up a new tank and was wondering if the White Cloud minnows would be okay. It will be a tropical tank, at about 76-78 degrees. Is that too warm for them? I know that typically they are a cool water fish. I also have water that is fairly high pH (about 7.8). - I used to keep a group of nine(the one in my picture being one of them) in low end tropical Mine were at 24c(76f). I had a Chaetostoma formosae(Blonde Rubber Lip Plec) too which also need cooler temperatures but I had a Betta which need tropical temps so I met sort of in the middle and kept them all at 24c. This was in a 30 inch long tank. Those nine WCMM are still alive(I no longer have the tank but they went to my fiancée's 300l with his WCMM) and happily living at 25c now. Breeding, eating and everything.  
 
Beyond the question of the conditions they can tolerate, I was wondering about tank mates. I've read some reviews for them that say that they are not very peaceful at all, and that they chase and fin nip other species quite a bit. Is this true? Is it only if they are kept in a small school? I am planning on getting a school of about 8 of the white cloud, but possibly putting a few guppies in the tank (29G) with them. - Mine never nipped anything in my tank but my Betta was a HMPK(short finned) male so they didn't really have much to nip. They now with with other WCMM, another Betta(again, HMPK but Dumbo too so big pectoral fins), Platies and Siamese Algae Eaters. They haven't nipped anything but they are also in a bigger tank and group. Mine were fine at nine(number of fish) but bigger is better if you can fit it. I would only recommend a maximum of 10 in a 30 inch long tank, they are very active lol. Guppies may get nipped. They have long flowing fins and are slower than mine and my fiancée's  betta's and platies... So they may be nipped if the WCMM are breeding(as they get a bit OTT about that sort of stuff) or just feeling generally nippy.
 
Has anyone had white clouds before? I would really appreciate any advice. - Me And all my advice is above lol.
 
Thanks! - No problem

 

 
My guess is that is due to water quality and the fact that they are in a shop and not settled in a tank. Mine were the brightest I've seen at 24c(76f) but that is just my experience. It is entirely up to you what you want to do. Mine were active too and readily breeding at 76f.

 

These are what mine looked like. Bad pictures with flash unfortunately as they were too active for good pictures
 


Note the pink tinge to the gold stripe, that was actually there... Not just the lighting. I also had a male with gold tips to his fins instead of white. Now nicknamed "goldy" in his new home with my fiancée lol.
 
As for whether Fluttermoth and Ch4lie have kept them before, I'm not sure Everyone has different experience with them. Mine is that despite what everyone says, they can and do tolerate up to at least 25c(78f) very well and will readily breed happily in it

 

id love to hear if this works as i saw some gold wcmm in town the other day and they certainly have caught my eye

 

 
This wasn't just on the dorsal fin though, this was all his fins - Tail included