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Carlo ORP Ranges: Very Bad : below 140 millivolt Bad : 141 to 180 millivolt Poor : 181 to 200 millivolt Too Low : 201 to 220 millivolt New salt water : 221 to 240 millivolt Low : 241 to 270 millivolt Medium : 271 to 310 millivolt Good : 311 to 340 millivolt Better : 341 to 360 millivolt...

Phyl We did a massive water change early this year (95% roughly) I wonder where I heard that before :D Some are binging to find out that large massive water changes do good things not bad things :) But you wont' here telling people yeah go ahead and do a 95 % change, you are on your own. Evey...

Carlo and Rich Bleach is something that can be used for ORP and is often used in the swimming pool industry. Although some what crude you can get close enough if that is OK with someone. There are even some calculators out to help you. I'll see if I can find some. For me there is to much to go...

Go for a good nap :D We all know how bad I am at typing / typo's :) Me not much sleep either the last few days, bad cold. Yeah and a missing finger does not work to well for me either. I just filled my coffe mug. Just makes me pee a lot.

Hmm, Chris once said...... Boomer p.s. I swear, we need to set up a collection to get you some typing lessons I just could not resist Chris :) Chris First sentence should read "bicarbonate for calcification and other reasont think that they use CARBONATE."

Chris Part of that came from the Walt-Bomber thread at the bottom http://reefcentral.com/forums/showthread.php?s=&postid=5089918#post5089918 galleon No, they are actually generally opposite (excluding stress bands from ultra-cold/ultra-hot anamolies). Tropical West Atlantic corals exhibit...

(well, 3 & 4 not so much 3. Like Baking Soda. 1 unit of the Bicarbonate, HCO3-, in BS will raise the Alk up 1 "unit" and the CO2 up 1 unit. So it is 1:1 4. Like Baked BS / Soda Ash / Washing Soda. 1 unit of Carbonate, CO3-- will raise the Alk up 2 units but only 1 unit of CO2 just like the...

Sorry Chris I missed that last part. I stopped at the being of the reactor part. >:(

You still owe me Beer jd ;) Are you lost again ???

One more ? Is there a common household product I can check the ORP against? No but we all wish there was one. You will have to buy one :) There are some links in the article.

You should be fine with that as it has the EC and a link/interfaced to the O2 electronics. I believe that is how that one works, just like other Salinity O2 meters.

Oops :D http://reefkeeping.com/issues/2003-12/rhf/feature/index.htm

Rich it may be best for you to try to read through this. I know some of it will be deep but you should get the idea. ORP and the Reef Aquarium http://reefkeeping.com/issues/2003-...ature/index.htm I doubt that it is the Purigen. When is the last time you cleaned that probe ? ORP probes need...

Chris The effect of any of these additive systems on the chemistry of the tank is the same once we return to equilibrium with the atmosphere.......we have more CO2 dissolved in our tank than in the atmosphere. Eventually this CO2 diffuses out into the atmosphere and we end up at equilibrium...

Carlo You didn't read what I wrote. TOTAL VOLUME. Here's an example. If you start with a pound of baking soda and put it in the oven for an hour and end up with 1/2 pound (wild guess) these two (started at same amount) will have the same affect on alkalinity. I never disagreed with what happens...

Lets look a this for std seawater @ SSTP based on your equation Alk =2.25 meq / l CO2 = 0.35 pH = ~8.15 and you should be 8.3 (actually you are off 0.18 pH units for seawater.) You are getting into one of my pet areas in chemistry the "CO2 -Carbonate System" . I might add I have 2 text book...

Something for Chris to comment on that I'm right on this issue. Something for Chris to comment on that I'm right on this issue. Carlo states in his lat post Based on the total volume (non-baked versus baked) the alkalinity affect will be the same (if total volume is dosed) but the direct pH...