Its a regular API test kit and its off the scale.
If you have the basic API test kit it only goes to 7.6. I have the API Freshwater Master Test Kit that has two pH test solutions. The second is for high range. My tank has tested as high as 7.8.
I have eco-complete as well as lava rocks in the aquarium so perhaps these might have something to do with the PH being so high.
I have Eco capped by CaribSea Peace River gravel, local river rocks (mostly granite), and Mopani driftwood.
If you have some lava that is not in the tank you can test it by putting a few drops of vinegar on it. If it doesn't react, it is probably not the problem.
Its literally off the charts. When I tried to get Petco to replace my dead fish, they told me my PH was too high and it is what caused my fish to die.
Why should I not throw in a few drops of PH decrease or at least PH stabilizer for my aquarium?
I panicked and tried to bring the pH down with API pH Down. I ended up killing three out of four corys and two Otos. See this thread
. I followed the advice and stopped messing with pH Down solutions. I added a DIY CO2 setup with a hagen ladder co2 diffuser.
Angelfish arrived shortly after I posted that thread. I kept them in quarantine for awhile and then added them to the main tank. They seem very happy. They are very active. Always hunting for food, and come to the glass when I approach. They don't seem to mind the high pH.
The neon tetra I read are suppose to have 6.2 to 6.8 and I'm at least if not over 7.6.
Corys supposedly like a similar range. However, if they are farm raised they can probably handle a much greater range.
I bought some USA farm raised False Julii Corys to replace the ones I killed by trying to control the pH. They are currently in a quarantine tank which has a pH of around 7.5. They seem to be doing fine.
The surviving one in the main tank looked very stressed for awhile, but after I stopped messing with chemicals it recovered and is doing fine now.
I may eventually get some drift wood which I think can lower the PH levels however I need to keep my fish from dying. Lucky nothing has died for the past few days however its crazy to have my PH so out of the norm.
I have a lot of Mopani driftwood in my tank and it didn't prevent the pH climb. If you get Mopani (beautiful stuff) boil it and then soak it for a month, changing the water daily. I only soaked mine a couple weeks and two months later the water still have a yellow cast to it.