ph controller

My 55 gallon angelfish aquarium is at 8.2 in ph and I want to fix that. The reason that it isn’t fixed already is because I look at the reviews on proper ph solutions and some people think the products are bad and some think it’s good. What would be product that could lower the ph without...

I am about to upgrade the lower end pH controller on my girlfriend's CO2 injected planted tank with a nicer model, at which point I will find myself with a perfectly functional pH controller and no real use for it.. I figured I would just stick it into my 110G cichlid tank and read the pH. And...