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Typically, you're looking for a one point ph drop with co2. Having the problem of dying inhabitants should be a clue your co2 is too high. All fish and invertebrates are different. I would reduce the co2.
Your algae could be from insufficient nutrients or high lighting. I personally would raise the lights as a start. Adding the dry fertilizers may correct the issue but the main culprit here imo is your lighting. You can even try raising the lights and increasing the photo period. The photo period and intensity is not linear. Low light for longer periods are less likely to cause algae issues.
Your algae could be from insufficient nutrients or high lighting. I personally would raise the lights as a start. Adding the dry fertilizers may correct the issue but the main culprit here imo is your lighting. You can even try raising the lights and increasing the photo period. The photo period and intensity is not linear. Low light for longer periods are less likely to cause algae issues.