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Your tank it’s big so you could start with 100mls of kalkwasser and test every day!! First 2 weeks I was doing around 10 alkalinity checks in a range of 2 hours in the morning, from 10:00 to 12:00.
this way you can understand how much used in this 24 hours and can adjust them keep checking if...
It’s better to test at the same time, testing every other day now And it’s usually in range.. when you see big jumps like 1.5/2.0 dkh different then probably the test kit.
remember that you coral will use more alk as they grow!!
mid you really worried take some water to the fish store
Best advice that I can give you is do not adjust your alkalinity with all for reef
you can use soda Ash for that purpose and use all for reef to keep it a stable. Then just wait
First time using kalkwasser as well and definitely loving it, got a bit scared after ph getting a higher than 8.3. But thanks God everything happier at this ph!! And with alkalinity I think every system reacts deferent to another, my acros did not look good until I was at 8.5 dkh. I guess light...
I would keep the leds as well. And I started with 6 hours a day had to cut it bit to 2 of them 4 hours and the other 2t5 2 hours on different timers, then ad time weekly half hour or full hour depending how your coral behaves
Good luck