Endler's livebearer in 6.6 Ph
Hello, I've had my first endlers for about a month now. They're in a 20 gallon tank with a betta splenden, blue velvet shrimp, and red crystal shrimp. I have 12 male endlers.
My ph is 6.6, I've heard lower ph on hardwater fish can cause organ failure and shorten their lifespan, is this going to happen to my endlers?
When I got the red crystal shrimp I didn't realize they were so drastically different from neos, and I worry raising the ph will kill it. I've also read numerous sources saying 6.4-8.0 for endlers works fine but I've also had people tell me it's not safe, am I over worrying?
What I mostly want to know is if the 6.6 ph is making my endlers suffer or if its actually okay for them but not ideal. Thank you for the help!