Hello everyone. Wanted to add my two cents. My reservoir switched from one to the other in about a week and here's what I did. I have a 65 gallon tank so I had to use 6.5ml. I didn't do it and neither should you. Too many stories about fish dying at normal doses. I used about 40 drops, that's about 2ml. And I gave it throughout the day (so 10 drops, then after 2 hours another 10 drops etc.) I did that every 3 days with a 15% water change at the end of the week done. I also dim the lights and only leave them on for about 10 hours a day. If you do this, you will have success against green algae. Also, the API claims it doesn't work against kelp, but it worked for me.
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