lduncan

good

If they are really "pointy" shaped kill them.

I agree, I wouldn't be missing the final of Lost either. Not even for a reef club meeting.

Still waiting for wasp to apologise though. Layton

meh 2Mb isn't broadband bring on 25Mb+ Cool pics though. Got to learn to dive one day. Layton

wasp, I'm still waiting for this. Like I said, post it here, or pm me. What are these half truths? They are all facts. Layton

Cost, and specialised hardware. If you use something like a palm, you still have to design additional interface hardware like analogue inputs etc. It's expensive. I haven't received the LCD yet it's still on backorder. There are many options for this including color PDA type displays. The one I have on order is a small 128 x 64 graphic module with a white backlight. The board will obviously be packaged in a professional looking case etc, and like i said before, it is also going to form the basis of another commercial product i'm looking at developing. It's still very much a prototype. Layton

Another update http://www.nzreefs.com/phpBB2/viewtopic.php?p=56#56 Layton

YT usually come from Hawaii. Red sea stuff usually comes through LA.

They may be hard to get, they come from Mexico area. They must come through LA though. Layton

How about a Catalina Goby

400 w bulbs are about that price too. Around $120 Layton

I apologise. I've edited my post. It was meant in humour. Layton

Nope not reef safe. Will usually pick like most large angels. Plus there are many nicer looking angels than them. Layton

Edited Seawater levels are low enough to require expensive equipment to test. I wonder how they do it when NSW levels are around 0.000006 ppm? Layton

How do you know this? Layton

The numbers are only huge relative to NSW concentrations. Iron can often be limiting in grow of bacteria and other organisms in the ocean (and by extension tanks), as phosphate is usually in plentiful supply. So it is likely that the surface area of the substrate plays a role in how much bacteria can colonise, and therefore the rate at which the iron can be released. As far as numbers go, i don't know. But bacteria have developed efficient means of extracting iron. Layton

Exactly! This is the fundamental difference between the Lars analysis and Habib's. Lars measured loss from the rocks. Habib I believe measured iron levels in the water. It's the reason why I said Habib's tests were less sophisticated. Not because the tests were inaccurate. They just don't account for all the iron added to the system. Yes. It is highly likely that iron is released bacterially, in addition to chemical disassociation. Layton

Let your fingers do the walking. There are heaps of analytical labs around. I have no idea about the cost. Alternatively some Universities will have appropriate equipment to carryout this type of test. So if you know anyone in a chemistry department, that may be an option. Just have to search around for a facility with appropriate detection limits. Layton

Take a sample to a lab, pay the money, get the analysis back. This is not something which can be done by a hobbyist. It requires specialist equipment. I'm still waiting for you to show me the inconsistencies too. Layton

Bashing your head won't help you understand. Layton

Who warned you? I am quite happy for you to quote me to try and find inconsistencies. It may actually force you to carefully read what i have written, which would not be a bad thing. Who knows something may fall into place. You can PM me if you don't feel comfortable posting them for all to see. Do you have evidence that this is the case? The evidence shows that under tank conditions running the full zeovit system, and average of 200ug/L was added.Which is indeed hundreds of times greater. Habib has confirmed at least 20ug/L, which is still significantly higher than NSW. Under tank conditions, and by testing the source of the iron, this value is likely to be much higher. These levels are nowhere near toxic levels for fish, algae or bacteria. It's acting like a fertiliser. The rapid increase to these levels can appear to have "toxic" effects on corals, by causing release of zooxanthellae. You'll notice later on in the study on Porities, they say that the corals can adapt to the new levels. Like in the Lars analysis? Do you know for a fact that this has that effect? Bacteria could possibly accelerate the release of iron? Why are the rock agitated daily? Exactly, the iron level in the system is independent of the iron level in the water. Habib's experiment may suggest that, as I believe he was measuring iron concentration in the water. The total iron used in the aquarium depends on how much and how quickly the iron is sequestered by animals within the aquarium. You could have undetectable levels of iron, yet still have a large amount being released and processes through your tank. Here is some info on iron in biology: "All living creatures need iron. Some get it in food and some by absorbing free iron from solution. Still others get it by secreting special molecules, called siderophores, which go out into solution, bind very strongly to iron ions, which are then actively reabsorbed when the species that released it comes into contact with the siderophore/iron complex. In many natural environments, ranging from parts of the ocean to the human intestine, iron can be in such short supply that it becomes a limiting nutrient for growth. As a consequence, organisms have developed elaborate methods of collecting iron from their environments. " To measure elemental iron is difficult to do achieve with a "test kit", mass spectroscopy i believe is the easiest method. Layton

I call yes bring back quotes. (with links).

So are you willing to take this back? Because in reality i never said the "opposite". Layton

As far as i'm aware, the only change to the zeolite was the addition of the 4th one to the mix. Your just assuming that the zeolite was completely changed. I see that the analysis was actually done in 2002. Again, if you bothered to read the thread, you will see why Habib refused to publish exact numbers. Less sophisticated in this case means that he definately measured the values he did. So they are at LEAST 20ug/L. However he could not discount the uptake of iron by bacteria and algae, which would have the effect of lowering the measured values. The Lars analysis could account for this. That is a very bold claim. I think he does this for his own personal interest. From the postings I have seen, he is a person who can separate his business from these sorts of things and look at them with a more open mind than most. I also think that what was said here in relation to Habib's involvement in the thread was disgusting: I fail to see why this is so difficult for you to accept that it is possible that the system may rely on iron to do what it does. To me it can explain everything that can happen when using zeovit. Layton