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Loud and clear...

RFD4, You missed out on a free rotifer culture at MACNA! I once bought a live rotifer culture on eBay from this guy: http://cgi.cafr.ebay.ca/LIVE-ROTIFERS-coral-copepods-fry-food-w-Phyto-rotifer_W0QQitemZ270470835628QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3ef9516dac (Don't ask me why...

We'll never know, but if they weren't properly maintained maybe they wouldn't have been fixed under warranty. I've been running my oldest Tunze (a 6000 bought used) on a Tunze controller for four or five years now. I had to clean it once, about three years ago.

I'll stick with my Tunzes. The Vortech demos are neat at MACNAs, but it seems to me that over half of the used Vortechs offered for sale these days have just had their wet side repaired/replaced under warranty. My LFS has ordered a number of replacement wet sides for customers. Interesting how...

Dave, I won a Digital Aquatics (http://www.digitalaquatics.com/saltwater/)ReefKeeper Lite (Level 1) at MACNA. So far I like it - the system in nice and modular and you can add more modules as you want to expand the capabilities. They have a trade-in upgrade path to the Elite head from the Lite...

Hawkeye, You're quite right. I posed the same question on RC in the tridacnid forum and two people posted photos. Thanks for the reply, Bob

Anyone know whether or not Joe Yaiullo keeps tridacnids in his 20,000 Gallon Reef Tank at Atlantis Marine World?

Besides Calcium, you also need to test for Alkalinity, as the two are interrelated. Here's a great article by Randy Holmes-Farley: http://www.advancedaquarist.com/issues/nov2002/chem.htm You need to plot a point on his graph, based on the calcium and alk test readings, and take appropriate...

I haven't used the Elos and can't comment on it. I have been happy with the Salifert magnesium test kit.

Are there any documented negative effects for Lanthanum Chloride? I don't believe the existing products have any warnings. I also found it a bit odd that the Knop article didn't mention any existing products - I wonder if he recommends not using them.

Interesting new Lanthanum Chloride article by Daniel Knop: http://www.coralmagazine-us.com/content/foiling-phosphate

Re: Diatoms? Looks to me like cyano. I don't think diatoms form mats, just thin yellowish films.

Before buying a chiller, you should consider just air-conditioning the room the tank is in. It is cheaper, and it will keep both the tank and you cooler.

I think they're called amphipods.

This is your lucky day! See you tonight...

Buying any specimens (inverts or fish) from a photo can be a little iffy. What are your assurances that the photo hasn't been Photoshopped? What are your assurances that the lighting the photo was taken with is the same lighting that you have? Caveat emptor...

Length (in inches) x Width (in inches) x Height (in inches) / 231 = gross gallons 48x18x24/231=89.766 Tanks are usually measured with their outside dimensions, so the rated size is not what they can hold. In this example the amount of water it can actually hold is probably closer to...

I don't see any downside. Maybe they don't know that sulfur is a major element in saltwater. I use a PhosBan reactor filled with CaribSea Geo-Marine Araganite as a second chamber to deacidify the water coming out of the first chamber. I don't think carbon would work to deacidify the output.

Thanks for the info. I had to pull a very large Desjardins Tang from my show tank (aggression issues), and the valonia has become noticeable in his absence.

I can't quite figure out the modus operandi of this filter, based on the description at http://aquaripure.com/Products.htm#Nitrate%20Filters . They seem to poo-poo sulfur denitrators, but I built my own sulfur denitrator and I am too pleased with it to consider using anything else.