rogierfvv
Full Member

3rd time around aquarium keeper, observer, learner
Posts: 84
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Post by rogierfvv on Sept 14, 2016 19:51:50 GMT -5
This is about the next steps in exploring the relevance of rH or relative Hydrogen score. Note that with the Wondershells we are adding Magnesium to the water, and this will result in the production of dissolved Hydrogen, so perhaps the lowering of the ORP is only a side effect, but the real deal is increasing the dissolved Hydrogen. The computation of rH is an approximation, which is only valid if we can ascertain that indeed dissolved Hydrogen is present... here is the equation: quote Magnesium metal also reacts with water to produce hydrogen gas: [Mg + 2H2O –> H2 + Mg(OH)2]. The magnesium hydroxide (Mg(OH–)2) dissociates into magnesium ions (Mg2+ ) and hydroxide ions (OH-) according to the equilibrium: Mg(OH)2 <–> Mg2+ + 2OH– 24 However, the reaction is not as exothermic and thus does not carry any risk of explosion unquote from: www.molecularhydrogenfoundation.org/core-information/how-to-get-the-benefits-of-molecular-hydrogen/I am gradually getting a bit fanatic about testing my water parameters, and keeping track over time. I just ordered some H2blue to test for dissolved hydrogen directly, and establish the fact that with the Wondershells we are indeed creating dissolved Hydrogen in the water. Once that is a known fact then we can use the rH scale to estimate the levels. Once the test arrives I will be reporting here on the findings.
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Post by Carl on Sept 15, 2016 8:48:40 GMT -5
Thanks for the continued research and sharing of these two links as well..
While I have had documented improvements in fish health with the use of AAP Wonder Shells, these blocks are primarily calcium carbonate, so I am not sure how much magnesium is needed for this reaction to make a difference (then again, maybe only trace amounts are needed?).
Carl
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tonyc
New Member
Posts: 1
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Post by tonyc on Mar 24, 2021 21:07:38 GMT -5
I'm so glad to have found this forum! The whole RedOx topic has renewed my fascination with my tanks (I have four), much to my wife's dismay, and this forum has answered many questions I had after reading the online docs at AAP.
I am now tracking my rH in 3 of the tanks, and getting the following results: 28.46 (10g) 27.93 (30g) 27.40 (55g)
All three tanks have Class C UV Sterilizers (hope to upgrade soon), and have just started using Wonder Shells from AAP. Note that I have an RO system I use to change / top off the tanks.
I read in the forum that your tank water should be slightly reducing (i.e., is slightly less than 28 rH). So I have some questions:
Q1: is slightly less than 28 really the target I'm aiming for? Q2: How far off the 28 mark is a cause for corrective action, both high and low?
thanks for any help.
TonyC
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Post by Carl on Mar 25, 2021 17:21:30 GMT -5
Hi & Welcome!
IMO, you are perfect and in the one where you are just a little over 28 (which is still good), you might add a higher amount of Wonder Shell or see if you can slow down your UV (upgrading to a Vecton UV or similar might help). Make sure to keep the Wonder Shells sealed in their bags too, as they degrade quicker with exposure to oxygen
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Post by devonjohnsgard on Mar 27, 2021 11:16:43 GMT -5
Welcome! and Welcome to the world of redox 
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