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Old 02-03-2007, 11:53 PM   #21
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Originally Posted by Kurt_Nelson
Just because your LFS sells it, doesn't mean you need it!
Amen to that!

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Originally Posted by MT79
IME coralline grows best w/ actinics or higher K (10k-14k)lamps. It seems to favor a more blue light.
That's also been my experience..., and I think melosu's glowing purple tank attests to that as well. LOL

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Old 02-04-2007, 09:24 AM   #22
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I`ve had many people in the neighborhood ask me what is that strange color light coming out your windows. It looks strange to us but not to our corals.



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Old 04-28-2007, 03:16 PM   #23
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Originally Posted by Kurt_Nelson
If you're going to continue with the PurpleUp, even with the comments folks have made here, please at least go out and get a Calcium and Alkalininty test kit, and use them. If you get your tank chemistry out of whack, you'll be cussing yourself later on.

As Melosu58 noted, you *may* be able to get the calcium levels you need with just your normal water changes. Personally, I can't because my fresh salt water only mixes normally to about 360ppm Ca. BUT... the point is, I *know* what my Ca levels are in my tank and in my new fresh water I'm putting in. Without knowing that information, you can't really make a decision on what you need to do. Your new salt water may have 400ppm Ca in it to start with... in which case you don't need to add anything to get coralline algae to flourish.

Take a read of this...


It's my favorite article on the whole Ca/Alk issue. You should see how the two are interdependent and messing up one can mess up the other. Messing with Alk can have bad effects on pH. And after your pH starts swinging all over, you're going to see problems elsewhere.

I think one of the best pieces of advice I've gotten off this board so far is that if you're going to add supplements to your tank, then you should at least test for whatever it is you're adding. If you're not testing, you don't even know if you need the supplement to start with. Just because your LFS sells it, doesn't mean you need it!
Thanks for the link to that article. I have ordered some of the purpleup due to never really having any coraline algae growth in my tanks and also some Ca/Alk tests...will watch it all while attempting to stimulate growth.

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