ChrisRD":3r5i2moq said:I would go with whatever is readily available locally at a good price. I mostly use IO these days because it seems fairly consistent from batch to batch, mixes up well, it's cheap, and it's easy to find. It's generally a bit low on Ca so I bump-up the level with a bit of calcium chloride...
Years ago (when I lived somewhere it was readily available) I used Tropic Marin a lot and I liked that very much.