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Terry: Was the 10 foot tank that you have made by a commercial enterprise? Anyone that you'd recommend for making a 10 foot glass tank for me?

Richard: Thanks for writing up your tank. I've been wanting to hear about it for a long time, and it sounds great. I have a question for you that perhaps you can answer, though it doesn't relate directly to your aquarium. I was wondering if groups of yellow tangs will actually school in a...

My article on the degradation of limewater has posted at: http://reefkeeping.com/issues/2003-05/r ... /index.htm In it I conclude that folks are overly concerned about degradation by carbon dioxide.

I'd like to solicit opinions from reefkeepers to gauge what the current sentiment around iodine is. So vote your opinion, please! I'd like to include this opinion in a couple of articles that I'm putting together on iodine in reef tanks and the ocean. TIA

Why aren't you dosing silica? It is easy to test. You very likely do not have natural levels of dissolved silica in your tank, and it is likely to be rapidly consumed when you add some. A number of tank organisms, from sponges to limpets, require silica and some may be silica-limited in your...

I'm putting together an article on how to select a calcium and alkalinity supplementation scheme, and I'd like to solicit some input so that I don't have to go buy a bunch of additives. Specifically, I'm looking for anyone who has any of the two-part calcium and alkalinity supplements (except...

Do you have the right amount of boric acid/borate in your tank? Are you sure? How do you know? Might you be using a salt mix with potentially toxic levels of boron? What biological effects do boric acid and borate have? Might borate be interfering with your alkalinity testing? Is boric...

Since Ron Shimek is proceeding to measure toxicity of tank water on sea urchins, I thought it would be useful for people to see this abstract. Humic acids apparently eliminate the toxicity of copper which is bound to it, and only the free copper is toxic: Effect of humic acids on speciation...

I'm looking to investigate whether I can come up with a cheap, DIY, simple (read idiot proof) one part solid balanced additive for calcium and alkalinity. There are several ways to go about this, but for one I'd need to know what people have found as conveniently available and cheap calcium...

That's funny! I was just at Home Depot a few minutes ago, and didn't find any Southdown sand for an experiment I'm planning, but didn't think to snoop around back! Randy

For anyone interested, we are having an extensive discussion of the Seachem borate and hydroxide alkalinity test kit in the chemistry forum at RC. FWIW, Gregory Morin of Seachem is one of the participants...

Charles: In the review of the Invers et al paper, you say that "It was found that at lower pH’s (5-6) the seagrass could photosynthesize at a greater rate due to larger amounts of CO2 being present. " That caught my eye as the pH should not impact the amount of CO2 and H2CO3 present in...

Anyone ever measure the pH in a silica sand bed (say, 2-4 inches down)? I'm curious how low the pH gets. In my CaCO3 sand bed the pH is in the mid 7's, but it is going to be maintained by dissolving CaCO3. In a silica sand bed, the pH may fall far lower, and I'm interested in knowing how...

For those chemically inclined, and especially for those who are thinking about how to interpret their iodine values coming out of Ron's water study, I've put together a set of links to high quality discussions of organic iodine compounds that are present in seawater...

This is a copy of a post that I put up in my reef cemistry forum ( http://www.reefcentral.net/vbulletin/forumdisplay.php?s=ea0da5e35bff855a83d32dc79c349ae6&forumid=112 ), but since many of you don't go there, I thought I'd start up a discussion here as well. In preparation for an article on...

Here are some of the original articles by Craig: http://www.animalnetwork.com/fish2/aqfm/1999/oct/bio/default.asp http://www.animalnetwork.com/fish/library/articleview2.asp?Section=&RecordNo=181

I just read a report that Patrick Neale of the Smithsonian Environmental Research Center has found that that the increase in UV coming through the ozone hole in antarctica is causing a decline in the photosynthesis of marine phytoplankton. Has anyone taken the time to see how the "excess" UV...

Since Julian has now had plenty of time to figure out what went wrong with Combisan, I'd like to approach TLF to provide an explanation of what happened in the Combisan fiasco (as he said they would). Before doing that, however, I want to make sure that I didn't miss a public explanation. Did...

There has been some suggestion on Reef Central that mangroves may deplete magnesium from reef tanks because they have a magnesium/sodium transporter that helps them stay in salt balance. Others suggested that the salt is then excreted on the leaves (which IME, is true, some salt is excreted)...

If the pH is correct, then there are several possible solutions: 1. Less limewater of the same strength. 2. Same amount of limewater, but more dilute. 3. More mixing of CO2 into the system (aeration). 4. Adding vinegar to the limewater. The best solution will depend upon many factors...