I didn't get good coralline growth until I started dosing kalkwasser to keep my alkalinity up. That's even with 3 bottles total over the span of about 6 months.
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Most of these bottles are accelerated calcium supplements. Keep up with your CA and lighting and you will have coraline growth support
My tank is 7 months old and natural coraline algae is starting to spread. Even with that, I just doser it wiht ARC purple helix this morning. I figured it was worth as shot and seems to be the only product out ther that contains actual spores. In six weeks, we'll see how it goes. I'm guessing that I'm probably not going to be able to tell a dirrerence between seeding and natural spread.Purple up won’t work. It doesn’t contain coralline spores. Just the extra nutrients they need to grow, most of which are doses as part of keeping corals anyway.
ARC coralline contains spores. It legitimately works. Could you get a couple dead snails and scrape some off for free? Sure. Could you scrape up enough to get full coverage of 100lb rock in 4 months? Doubtful. There’s a local guy that went from brs reef saver to complete purple and red coralline in 4 months. Added it the day after he confirmed his cycle was done. And the reviews on amazon support this guys experience
I’ll be adding a bottle of each of the red and purple sometime in February, once I’ve got my levels stabilized and my current QT residents in the tank . I plan to do a full review, with pictures
Snake oil.