I'm switching salt mixes and I have two bags of regular Instant Ocean I am not going to use. $10 takes them both. Pickup only.
Any reason for mixing the two salts together? I'm switching to coralife which has parameters closer to where my tank runs.I'd suggest you keep this salt and use it during your transition. 1/3 IO to 2/3 your new salt on each water change. That's what I'm doing using up the RC i have left.