There are several ways, but i dose using 3 part I make myself and two brs dosing pumps one for alk and one for calcium. In my opinion as soon as you jump up to lps its probably time to start dosing. You need to maintain a good calcium level so they can build their structure, but the calcium isnt as volatile so i dosed that manualy for years, but alk sways really quick if your not careful so if you dose anything alk would be my first choice. With that being said I cant imagine your alk is really that high without dosing so I would start with a better way of testing it bc without that you cant even begin dosing. The hannah checker is really good for alk. I would have to dose way to much to get my alk as high as whatbyou reported. Either your test kit is wrong or tou are doing something that is raising it bc that isnt a normal number.But how do you keep alkalinity stable?