For the past few years I have been happily using Instant Ocean marine salts for my tank, cant say Ive had any complaints. I recently switched over to Kent and have liked the stuff thus far. My question is this; was going through some stuff and found a small amount of instant ocean salt, about enough t make 30 gallons, A WATER CHANGE! Im wondering if I use whats left of the instant ocean to do a water change if it will affect my tank as I have been using the Kent products. Let me know what you all think, Id hate to let it go to waste!
