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  1. Adults can suffer from the same thing, but infants are far more susceptible. Substances that can cause methemoglobinemia Inorganic agents Nitrates – Fertilizers, contaminated well water, preservatives, industrial products Chlorates Copper sulfate – Fungicides Organic nitrites/nitrates Amyl nitrite Isobutyl nitrite Sodium nitrite Nitroglycerin Nitroprusside Nitric oxide Nitrogen dioxide
  2. Today is the birthday of Albert von Szent-Györgyi de Nagyrápolt (September 16, 1893 – October 22, 1986). Albert was a Hungarian physiologist who won the Nobel Prize in Physiology or Medicine in 1937. He is credited with discovering vitamin C and the components and reactions of the citric acid cycle. It has been over 70 years since his discovery, but his discovery is no less meaningful today. Notable Publications On Oxidation, Fermentation, Vitamins, Health, and Disease (1940) Bioenergetics (1957) Introduction to a Submolecular Biology (1960) The Crazy Ape (1970) Electronic Biology and Cancer: A New Theory of Cancer (1976) The living state (1972) Bioelectronics: a study in cellular regulations, defense and cancer Lost in the Twentieth Century (Gandu) (1963)
  3. 4 hours is typically enough with aeration. If it's in the sun, maybe a few hours less. Most people opt to wait 24 hours, which is more than enough time. If you're in a rush, the best thing to do is to agitate the water as it goes in as much as possible. Set up a rock or target to aim the hose at before it splashes into the main tank. The idea is to create a super thin layer of water exposed to the sun and air before it pools up into one big mass of water. This will release most of the chlorine instantly if done right!
  4. lol, gotcha!
  5. That dosage is PPM (1/1000000) or PPT (1/1000)??? That seems kind of low to me! Some websites even say 2 tablespoons per 5 gallons, but this particular product has this on the product instructions label. The below is all for salt (NaCl): (2 Tbsp/10 Gallon)(14.8 mL / Tbsp)(2.165 g / mL)(1 Gallon / 3.78 L)(1000 mg / 1 g) = 1695 mg / L = 1695 ppm Salt = 1.695 ppt Salt According to the actual product, if my math is correct, 3 ppm or even 35 ppm would be insufficient. IF you did the 2 Tbsp per 5 gallon it would be right around 3 ppt of Salt. I think this is what you meant!!! ;-) I don't think there are any "anti-caking agents" commonly in use today that would pose harm to fish; however, iodized salt would be a problem.
  6. I'm not sure I completely followed, but ascorbic acid (vit C) effectively treats chloramine, but it's not so effective at what is typically referred to as just "chlorine", BUT that depends on WHAT they used to add the chlorine. It's hard to explain unless you have a background in chemistry, but basically they use different chemical compounds to add chlorine. Even chloramine has different isomers... they don't always react the same, and in some cases completely differently. What the study says is that it's great for all the ones studied, but not so great for chlorine added as say HCl or OCl, or just Cl2. As far as the "food safe" I didn't even think of that because all the sources I have ever purchased it from were intended for human consumption. Go to your local drug store and buy a bottle of pills. It lists the dosage on the bottle. Just count out the pills, crush them, dissolve them, and add them to treat the water. Easy!
  7. Wow, very interesting. Most APers I have worked with don't have enough iron! This is very creative though. I would have done something completely different!
  8. I couldn't agree more!
  9. Very good! Also, the exact quantity depends on the chloramine concentration. However, given the maximum legal concentration allowed in drinking water it's safe to assume about those doses. A word on the overkill... the EPA does warn that ascorbic acid can cause chemical speciation leading to some hazardous compounds. I just learned this via this forum; so, I don't know all the details, but you sound like you have a foundation in chemistry. I will provide you the document: EPA DOCUMENT ID: 600J00018 Ascorbic Acid Reduction of Residual Active Chlorine in Potable Water Prior to Halocarboxylate Determination (2000) I will try to attach it as well if I can figure out how... GOT IT: [ATTACH]3110[/ATTACH] 300023BU.pdf
  10. I look forward to learning from each other! In fact, I already have! (The posts on chlorine, very good, thank you!)
  11. Haha, yes there is a lot of confusion. I think people have it in their head that "organic = good" and "inorganic = bad", but what most people don't realize is that plants predominantly absorb nutrients in inorganic forms. I realize most people don't have the knowledge to figure this out for themselves, but the whole "organic movement" and "organic certification" is just corporate marketing at its best. The environment is still impacted, food nutrition is still lost, and it is not done in a sustainable manner. It's just silly to even try to have this kind of PREJUDICE! Yes, I realize there's a bit of wordplay involved here, but I want to shake people's assumptions a bit. Aquapionics isn't great because it "meets organic certification", but it's great because it's SUSTAINABLE. Aquaponic systems can have a ZERO impact on the environment. ZERO! What other current agriculture practices can claim that? NONE. ZIP. ZERO!
  12. Again, I'm not disputing the effectiveness of salt (NaCl) as a treatment for fish; however, a broad generalized statement that it's "great for fish" is dubious, incorrect, and clearly dissemination of false information. THINK about who might read that? A new aquaponics hobbyist, right? Do you really want to be responsible for killing their fish? They will add so much salt to their aquaponics system they will kill everything. We don't want to trick people into making assumptions on false generilized statements. Do you see what I mean? Some fish are stenohaline, and by definition they cannot tolerate salinity. We all know euryhaline fish, like Tilapia, can tolerate plenty of salinity. I don't mean to pick at what you said, it was just a very erroneous statement. Also, we don't put salt (NaCl) in our aquaponics systems (unless you REALLY know what you're doing). As far as the chlorine, your article lists a preliminary and inconclusive EPA study. The author is clearly bias towards making a case for ascorbic acid. How do I know? Because he uses bits and pieces of information to bolster his case and then jumps to a conclusion. The EPA study he used was from 1988. This article was written in 2002. There is, IN FACT, an EPA article from 2000 that states ascorbic acid is not effective for dechlorination as found in most municipal water sources (tap water): EPA DOCUMENT: 00J00018 Ascorbic Acid Reduction of Residual Active Chlorine in Potable Water Prior to Halocarboxylate Determination (2000) Folklore, folklore, folklore. All I can say is THIS MYTH HAS BEEN THOROUGHLY BUSTED!
  13. Do you have any vitamin C tablets at home? Use one 500 mg pill for every 25 gallons you are treating. Crush it up as fine as you can. Dissolve it in a small cup of water before adding it to the larger water volume. This would be a "free" option if you already have the vitamins. Otherwise, it might cost you a dollar at your local store.
  14. What a great concept! Thanks for sharing.