As I have been gone for a few years, just set up another tank, and have recently been thinking of my good friend Tom, I'd like to bring up a topic he and I discussed long ago, but never received a satisfactory answer to. Anyone who is a diver knows that colors/wavelengths are filtered out of...

Which colors of light found in the PAR spectrum best support zooxanthellae? In what ratios? The purpose of this thread is to host a discussion in which we will share knowledge about zooxanthellae and the conditions best for its growth and development (with an emphasis on PUR). For a...

I was hoping to get anyone's opinion on corals expelling zooxanthellae. I am new to the hobby, so any help is appreciated. I have a 75 Gallon, 48x18x20, tank with a 6x54 tek light. I have 3 Ati Blue+, 2 Ati Coral+, and 1 Ati Purple+ bulbs. I have a acanthophyllia (meat coral), ricordia...

Check out this article from advanced aquarist. It discusses the core processes of how the zoox functions and has a list of the thousands of different "types" of zoox and the corals they reside in. Its VERY long and I suggest reading the article up until it starts to beak down the zoox types and...

My Bubble coral just recently deflated slowly while spitting out brown strings. is this a problem? I just did a water change today and added supplements to the water. I also fed it today. its been about 15 minutes and it is fully deflated but stopped spitting out brown strings.

What do you do to get better color out of your corals? How do we define "better" coloration? What do you think harms the coloration of corals, anemones or clams? Are the variables you look at different for softies, SPS and LPS?

I thought I would start a thread to document the recovery/demise of the critters I have left. I'm not worried about the fish. The ones I have left are doing fine. All four anemones are in poor shape allong with my red brain. My clam seems unaffected. Please don't pay attention to the algae...