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Message: <blockquote data-quote="Ron Reefman" data-source="post: 10843441" data-attributes="member: 23403">Coralline algae will start on the glass if you leave it untouched for a week or so. That would confirm you have it growing.Test your water for Ca, alk & Mg. Don't dose anything or do water changes for a few days. Then test again. Then go to Reef Chemistry Calculator at  <a href="https://reef.diesyst.com/chemcalc/chemcalc.html" target="_blank">https://reef.diesyst.com/chemcalc/chemcalc.html</a>. Put in your original levels and your new levels and pick the brands of Ca & alk you want to dose. It will tell you how much to add.Then take those amounts and divide by the number of days between your first test and the second. That's going to be very close to what you should be dosing every day.Example: Alk on day1 is 8.0dKH. On day 3 it's 6.5dKH. The calculator says you need to add X amount of alk (like baking soda or soda ash). Let's say it says 30ml of baking soda. Then divide 30ml by 3 days and you find you should be adding 10ml every day.I test every Monday and every morning  I dose 30ml of soda ask for alk and 50ml of Dowflake for Ca. I use soda ash and Dowflake mixed to Randy Holmes-Farly's receipe #1.</blockquote>