Baking soda (sodium bicarbonate) alone will not raise the pH in a marine tank. It will actually lower it while adding buffer. Washing soda (sodium carbonate) will raise the pH while adding buffer, but if you use too much, you can have drastic results.
What is your pH of your tank? When are you measuring it? It is normal for the pH to be below a target of 8.1 -8.2 in the evening. Try measuring the pH right before the lights go out and see what it is.
can i use pickling lime at walmart
I assume you are wanting to use it as kalkwasser for your Ca
loving inverts. Sure, you can use it. I like Ms. Wages, but Balls is also supposed to be good.
and if so how do i use it correctly
In a nutshell, it will need to be mixed in a mixing container with fresh water (preferably RO
) and let sit overnight so that the undissolved portion of the lime will settle to the bottom of your mixing container. Then you need to siphon off the clear liquid (not the solids at the bottom) and slowly drip that clear liquid you siphoned off into your sump. All you want to do is try to replace the exact amount of water that is removed via evaporation. Do a search on this forum for "kalkwasser" and see what you come up with. There is a ton of information on it.
Do you have any Alk
demanding inverts in your tank right now? If not, you don't need to even thing about dripping kalk
yet. You also need to get an Alk
test kit before you begin dosing Kalk
as well to check those levels.
another thing - if i put some crushed coral in the bottom of my cascade 300 hang on power filter will it help to some degree to stabilize the ph?
Your profile says you have a 90 gallon. I doubt adding CC
into a power filter will do much to buffer that much water unfortunately.