I’ve got 2x 5yo Eastern long necks, they were in a tank the first 4 years and I made them a pond close to 12 months ago. I’m hoping for some advice on safely lowering the pH and upping the GH in my turtle pond and advice on what may be causing the issue. pH = 8.4 Ammonia = 0 Nitrate = 0 Nitrite = 0 GH = 100ppm KH = 80-100ppm When I first started the pond the pH was low, I added calgrit and it’s been consistently high. I need to find some river sand from somewhere, only calgrit on the bottom of the pond at the moment. I’m in VIC, heater set at 20 degrees so it doesn’t fall below that, they’ve only been in the pond about 11 months and was dropping to 13 degrees without the heater in winter. Sits around 26 degrees in summer. Currently no plants, a few feeder fish and a gold fish in there. Recently upgraded my filter, built a large canister style filter (mechanical and bio) need to add a UV filter into the mix I’m thinking. Any help/advice would be much appreciated.