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CO2 drop checker kit - monitor the correct levels of CO2 in your Aquarium

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Vendeur: plantsforyourtank (2.739) 100%, Lieu où se trouve: Blackpool, Lieu de livraison: GB et de nombreux autres pays, Numéro de l'objet: 331305085756 CO2 drop checker kit - monitor the correct levels of CO2 in your Aquarium CO2 Drop Checker Kit complete with Testing solution This kit contains everything you need to get your CO2 flow right in your CO2 enriched aquarium and includes the following. Glass CO2 Drop checker.** Suction cup to mount the Drop checker. 50ml bottle if 4dKh*. 5ml bottle of indicator* pipetteFull instructions. *additional solution can be bought separate ** please note that the drop checker is NOT supplied in a box, this is to keep the price down and to reduce the impact on the environment with unnecessary packing.PLEASE NOTE, THE PICTURE OF THE PRODUCT IS SHOWN WITH A PRE-MIXED SOLUTION BUT THE ACTUAL PRODUCT IS SUPPLIED WITH SEPERATE REAGENT AND 4dKH SOLUTION. CO2 Measurement Using a Drop Checker So, you worked out that the amount of light you have REQUIRES you to add some CO2. The next big question is how much. Adding CO2 is the trickiest things associated with a planted tank to get right. In a high tech tank, it is probably the most critical item and is root of all sleepless nights than any other issue. Most things we add to our planted tanks are well behaved, but with adding CO2 we are dissolving a gas which in a way is like juggling sharp knives. Similar to adding nutrients, if the level is too low the plants suffer and algae is induced. Unlike the other nutrients, high levels cause immediate toxic effects to the livestock through asphyxiation. So why is it so hard to get it right? If you think about carbonated liquids like lager or Pepsi, youll agree that they are most fizzy just opened and cold. If left open in the fridge they will go "flat" after a day or so. If left uncovered on the living room, next to a radiator they'll go flat in a hour or so. This is because at lower temperatures water holds more of the gas in solution while higher temperatures tend to drive off the gas more quickly. What we are trying to do is to make a fizzy drink that doesnt go flat with a liquid at tropical temperatures. Its not rocket science, but a little understanding of chemistry and physics will help. Probably the most useful thing you can get to monitor and maintain the correct CO2 levels is a drop checker. So what does a drop checker do? The drop checker is nothing more than a fancy pH test kit, Many hobbyists already own a pH test kit which shows blue if the water sample is alkaline (has a pH more than 7) green if neutral (has a pH of 7) and yellow if acidic has a pH less than 7). These are typical when the chemical used in the pH test kit is Bromothymol Blue. What we are attempting to do is for the checker to show us the pH at which we have carbonated the tank water high enough to satisfy the plants' demand but low enough to be non-toxic to the livestock. Most agree that the nominal concentration level for highly lit tanks, more than two watts per gallon is at or around 30 parts per million. The relationship between CO2, pH and KH When CO2 dissolves in water a small portion of it combines with the water to form Carbonic Acid. As more CO2 dissolves and combines with water, the more the pH will drop. pH is a logarithmic scale, A pH rise from 6 to 7 shows a tenfold decrease in the acid concentration. A pH drop from 6 to 5 shows a tenfold increase in the acid concentration. kH is referred to as "carbonate hardness" or Carbonate alkalinity and is a measure of the amount of carbonate and bicarbonate in the water. These are coincidentally the same type of products which occur as the Carbonic acid is formed by CO2 injection. If, however, the water already contains carbonates and bicarbonates, the effect is to deactivate the acid. Carbonate and bicarbonate therefore act as "buffers", to keep the pH higher even as more CO2 dissolves in the water. It is for this reason kH is also known as a measure of the "alkalinity" of water (alkalinity=high pH). The relationship in practical terms therefore is that if Bob has tap water measuring pH 7.2 and kH 10 ( high levels of carbonate and bicarbonates) then 30 ppm of dissolved CO2 may only cause his pH to drop to 7.0 On the other hand, if Frank has tap water also measuring 7.2 but kH 6. More acid can form in his water (because of less carbonate and bicarbonate levels), so 30 ppm dissolved CO2 in his water will result in a pH drop to 6.8. If Tony suddenly added sodium bicarbonate to his water, his kH would rise. No CO2 would be lost. He would still have 30 ppm CO2 dissolved but the bicarbonate would bond to more acid in the water and he would see a pH rise.. Some people use tank water in the drop checker Dont do it. If dissolved CO2 were the only source of acidity in the tank it would be a simple matter to measure the pH and use an equation or a chart to determine CO2 levels. Unfortunately this is almost never the case. There are many sources of acid and alkaline in your tank varying from urine and ammonia, from fish waste or un-eaten food to phosphates or salts we ourselves add as plant nutrients. The result is that the pH measured in the drop checker, if you used tank water is unreliable because it does not accurately reflect the acid caused by CO2 dissolving in water alone. The accepted practice is to use 4 dkH solution to fill the drop checker. 4dkH solution is distilled water that has been adjusted to a known kH value. Some cheaper 4dkH solution is made from de ionised or RO water. While this will give acceptable results a more accurate reading is gained from a solution made with distilled water. By using 4dkH, the drop checker only reacts to direct contact with CO2 evaporating from the tank into the checkers air bubble and then into the water sample. There are different values of dKH solutions available, but it has been calculated and verified through testing that a distilled water sample adjusted to a carbonate hardness of 4dKH a 30 ppm concentration results in a pH of approximately 6.6 which, using Bromothymol Blue of a pH test kit in the drop checker turns the water sample in the checker green. 4dKH water has now become the standard solution for drop checkers. How is the checker assembled and mounted - Are all drop checkers equal? Drop checkers come in a million sizes, shapes and materials such as plastic or blown glass. The more exotic the construction, the more expensive the kit is. BUT, I have never seen any particular shape, size or material make one tiny bit of difference in the response time or the accuracy of the checker. How to use a typical drop checker Using the syringe or pipette pull 1.5 ml of the 4dkH from the bottle and transfer to the drop checker Squeeze 3 drops of the reagent into the vessel and shake gently. The solution will turn a blue-green indicating a pH of around 7 By gently shaking and tilting the drop checker get all the solution into the bulb part of the drop checker. Once all the solution is in the bulb section, invert the drop checker, without spilling any liquid, so the opening is at the bottom. Mount the checker on the inside of the tank, trapping air in the checker. Should I turn off the CO2 at night? Turning off the gas is in theory optional and many prefer to switch the supply off at night because it will stretch your CO2 supply out by up to double. CO2 isn't needed at night as the plants use oxygen and so compete with the livestock. If the gas is turned off it gives them a break and the peak level can be driven higher during the photosynthesis period. By turning off the CO2 at night, you are adding additional components to your CO2 system, more components for potential failure. But like the rest of your CO2 system, if you go cheap, failure is more likely. Drop checkers' colour change response is slow. This is something you have to just accept. Spend a fortune on expensive fancy drop checkers if you like, but the time it takes for colour change in the checker will be the same! In the morning, after you've turned on the lights and the CO2, the checker colour is only telling you what the CO2 concentration was an hour or so ago. A few hours after the lights and gas have been turned on, the CO2 concentration in the tank arrives at, and become constant at its peak level (injection rate, minus evaporation and plant consumption). Approximately two hours after, there is an equilibrium of CO2 concentration in the tank, in the air bubble trapped in the drop checker and in the checker's 4dkH/ Bromothymol Blue. This process may take 4 or 5 hours so you have to be patient with the drop checker and with the adjustment of your CO2 bubble rate. If you lose your nerve too early because the colour isn't changing fast enough you turn up the gas and a few hours later the livestock will be asphyxiated and the checker turns bright yellow. You see the livestock suffer and turn down the gas then the plants may suffer. This is the yo-yo effect many suffer and will induce things like thread algae or black beard algae. You need to monitor your drop checker with a set routine and stick to it. It may be best to start on a weekend or when you are at home with plenty of time to monitor things. Use 4dkH water. Set your initial bubble rate and keep an eye on any changes throughout the day. Find the maximum stable concentration and note the time of day it occurred. If that colour is too blue make a minor adjustment by increasing the bubble rate and leave it there for another day. Note the maximum again and make another minor adjustment if necessary. Remember that most fish can tolerate limeade green or even into the yellow if you turn off the gas at night. If you have a covered tank you may find you can turn the CO2 off a couple of hours before lights out and in the morning the checker may still show in the green. No problem, turn on the gas an hour or two before lights on. If you are patient, you'll find that you'll use a lot less CO2 because of your fine tuning. It's much more important that your CO2 concentration is down to a nominal level in the morning when lights first go on. In the afternoon the concentration is at its peak and the plants are on full photosynthesis mode. Nearing the end of the day you can cut back the CO2 because there is still plenty of gas dissolved and the plants are beginning to lower their consumption. Type: CO2 monitoring, Brand: TMA/PFYT

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