Ph for livebearers

Hey guys, I'm back with yet another stupid question, probably.
I have a 6.5ph - got guppies, mollies and platies, tetras and rasboras and some invertebrates. I was told when I started that this PH would be ideal for all species, but recently, speaking with an experienced guy he told me livebearers do not like soft acidic waters, particularly mollies. Now my molly was a young girl when I bought her, panda kind, and the black part was full black now its fading on the edges and I did some research on common signs of stress on mollies, I've noticed shimmies and glass surfing as well. Is this a sign of wrong water? Some websites claim any of the livebearers will live well in a Ph range from 6 to 8... While others claim no less than 7.5....
Now the real question, if I do change my ph to 7 (over time obviously) will it be okay for all the fish? Tetras and rasboras prefer acidic waters but supposedly according to websites they can live in 7ph. In the store I buy my fishes it's hard alkaline water from the tap.

 

hi mate livebearers like a ph range from 6.50 to 7.9 I keep my ph at 7 for my endler guppies and have no drama mollies like a ph around 7.5 platys like it rangeing from 6.5 to 7.9 as do sward tails

 

and yes your other fish will be happy with a ph of 7 with no dramas but do it over 6 days changing the ph to fast is dangerous for the ph it will cause ph shock so best done over 6 days cheers john

 

your welcome mate

 

So I would guess I can not keep the mollies? Since the tetras and rasboras will not enjoy the 7.5 and mollies will not enjoy 7? Guppys and plattys seem to do alright in 6.5 but the molly doesn't seem to be too happy about it. As for the ph, my idea is, I got black water tank, every week I add one catappa leaf in the water change. So I'm gonna reduce on the leaves until I get the ideal ph, maybe one every 2 weeks or monthly. Thanks for the help

 

it can be done if u do it very slowly are we talking black mollies or different if different they will handle a ph of 7 the black ones are more sensitive

 

your welcome I use that leaf to in my tanks

 

I've got a golden panda molly which is the one showing signs of stress. And the full black molly which seems happy even with a betta chasing her (betta will get over it - just added the molly)

 

ahh ok it sounds like you have it under control apart from the panda molly it may be sensitive or its had ph shock may be try the ph at 7.2