As long as you are not going to attempt to bred them they can handle high pH with no problems. I keep all fry in tanks that only have well water pH 8.2, its good for growth as it contains alot of minerals for them.
Only when I am ready to bred do I begin to soften the water, with a combo of RO and well water getting it down to around pH 6.5.
Try not to use additives if you can help and keep the conductivity low.
The are not difficult, only need more attention, do to the water requiments and frequent water changes (2 to 3 wekly changes of 50%)
Hope this helps
Fred H