Lots of luck.
My ph is a solid 8.4
My kh and gh are almost o out of the tap.
I keep my kh at 150 or more.
With a low ph and kh you can have a ph swing that will make your ph crash.
With my stable high ph I don't have to worry about a crash.
The reason I keep my kh up is because my filters eat it up.
I did have some water lilies in it but koi kept making a mess so I removed them.
I still have them in a stock tank in my orchard and they are doing fine.