Hey all this weekend I got myself a calcium test kit its a salifert test kit and I got a verry high reading its over 500 so I am concerned what I did next was test the ph and its low at between 8 and 7.7..I dont have a alkalinity test kit at this stage and wont be able to get one in the next week so my question is what can I do to pick uP the ph is there any quick fixes I read you can add baking soda is that true and how much do I add in a 1000 litre tank