Don't perform any more water changes yet until you get your Alk testing sorted out.
Salt mixes can separate during shipping and you may be getting very different readings from your bucket right now over what was intended when it was packaged as you're only using a small portion of it.
I trust my Salifert Alk, Ca and Mag kits.
What are your Alk readings when you mix a fresh batch of saltwater?
What is your DT salinity at? and what are you using to measure it?
Salt mixes can separate during shipping and you may be getting very different readings from your bucket right now over what was intended when it was packaged as you're only using a small portion of it.
I trust my Salifert Alk, Ca and Mag kits.
What are your Alk readings when you mix a fresh batch of saltwater?
What is your DT salinity at? and what are you using to measure it?


