Hi @Plants234I also contacted the people who sold me the ph and tds pen ... they may be faulty ... sigh ... new ones on the way.
Hi @Plants234It is a Vivosun product --> I'll let you know how the new ph pen works. I am hoping the product turns out good as they have a nice light for sale too.
A lot of people seem to go astray with that sort of thing.I have been doing ph kh tests to cross reference.
Hi @Plants234Drop checker in mail right now! I have been doing ph kh tests to cross reference.
A lot of people seem to go astray with that sort of thing.
If you explain what tests you do, how, and what you are trying to achieve, some-one will spot any flaws there may be in the procedure. If it's really obvious it might even be me that spots it
That makes sense —> The tds meter seems to be ok.Hi @Plants234
In my professional opinion, no-one can make a trustworthy pH meter for $12.99, which is the price shown on the Vivosun web site. TDS meters are different as the electronics circuitry is much simpler and the electrode material much cheaper. I'm not making this comment out of snobbishness as that is not my scene. I just want to draw this to your attention. An alternative would be a narrow-range pH aquarium test kit.
After testing my tds in this batch I am close to 500microseimens,
I'd honestly stop trying to mix the <"perfect water">.I finally mixed a batch of perfect water change water (which I should have started with when I cycled the aquarium) with GH=6/7 and kh=4 (both in degrees) ... with calcium:magnesium on a 3:1/2:1 and the carbonates with potassium cation (reduce my dosing).
However, I removed my almond leaf (and some peat) from the filter so that I wouldn’t have any of those acids to see the true co2 concentration ph drop.
I'm not a CO2 user, but I agree with the others.to estimate the dissolved CO2 concentration in your tank? If there are other acids and buffers in the aquarium water, this table can give misleading results.
Hi @Plants234I seem to be getting a solid drop from about 7.8/7.6 to about 6.6/6.8 ... it actually dipped lower and that’s when i saw my fish gasp. I dropped it and the last few days they have been ok.
Just trying to understand - you can use any water you want for an aquarium and of course we have cheaper alternatives (tap) and more expensives ones (RO). RO provides us the ability to do "science" and literally control what is in the water we have; throw purigen in your filter, and you've got nothing but what you put in (hopefully). Tap water is good too (I use it), but mine has near 0 KH, so I have no buffering ability and without that my pH will plummet from CO2 and the denitrification process (add almond leaf and peat for health of the fish and plant purposes) and you have a tank that is going to crash. Your suggestion of remineralizing to 2dkH (let's say with cations that contribute to GH: Mg + Ca) gets around the crash factor that I suggested (and may give a few dGH -- can you comment what the equivalent might be?), but why not 4dkH (please don't say but why 4kH when 2dkH works ... lol)?Hi all,I'd honestly stop trying to mix the <"perfect water">. Because you are starting from water that is low in dissolved solutes you have an advantage. If you want to add a bit of hardness (dGH/dKH) that is OK, but you only <"need a portion of what you are adding at the moment">.
The drop checker changed to the same color as the ph in my aquarium: either the ph indicator is very inaccurate (possible and there are minimal acids in my aquarium) or there are no other contributing acids in my aquarium (I should add - or compounds that form hydronium or bacterias etc that form h+ as a result of their mechanisms ). My intuition tells me that the both of those situations are not the likely ones: can someone enlighten me as to whether or not things (biological or molecular - denitrification excluded) form acidic compounds in our aquariums rendering the necessity of drop checkers to verify CO2 levels (which @jaypeecee finds less useful)?The pH ~ CO2 ~ HCO3 equilibrium chart only works for a drop checker with 4dKH solution. This is because of the air gap (across which only dissolved gases can diffuse), the colour change just measure the CO2 that diffuses across the gap into the solution.
Yes, this is the conventional view, but it was based on our "best guess" and the bacteria that we thought were responsible for nitrification.so I have no buffering ability and without that my pH will plummet from CO2 and the denitrification process (add almond leaf and peat for health of the fish and plant purposes) and you have a tank that is going to crash
I honestly don't know where the lowest "safe" level of dGH/dKH is. I use rain-water in the tanks, but I live in an area where it is all limestone and even in the winter our rain-water picks some dGH/dKH from dust etc. I never have source water of less than about 30 microS, and ~2 dGHdKH.Your suggestion of remineralizing to 2dkH (let's say with cations that contribute to GH: Mg + Ca) gets around the crash factor that I suggested (and may give a few dGH -- can you comment what the equivalent might be?), but why not 4dkH (please don't say but why 4kH when 2dkH works ... lol)?
Conductivity definitely isn't the parameter that we would like to know, but it is about the only meter or test where you can just dip it in the tank water and get an accurate, and repeatable value. These values are linear over many orders of magnitude from RO water all the way to sea water.Can you elaborate on the benefits/detriments and implications of conductivity levels for me?
The neutral salt (salt of a strong base and a strong acid) just raises the <"ionic strength of the solution">, but it doesn't change the pH. The K+ and Cl- ions cancel one another out. The pH meter is a modified conductivity meter and it is just that the meter reaches equilibrium much more quickly in a higher ionic strength solutions.An example was from one of linked posts above, "adding a neutral salt (like KCl) definitely works to stabilise the reading on a pH meter" ... how?
Yes there can be other acids ("H+ ion donors") present, when you are adding fertilisers some of the salts will be acidic, some will be neutral and some alkaline. If you take <"potassium phosphate"> as your fertiliser if you use KH2PO4 it is an acid and if you use K2HPO4 it is a base.can someone enlighten me as to whether or not things (biological or molecular - denitrification excluded) form acidic compounds in our aquariums rendering the necessity of drop checkers to verify CO2 levels
Interesting!!!!! Does the nitro-spira denitrification still produce 2H+ through the process?The main point would be that scientific advances in the last fifteen years have identified a huge range of nitrifying organism, many of which belong to the Archaea, and these don't have the same requirement for high alkalinity and high ammonia loadings. We now know that Nitrobacter winogradskyi, <"the bacteria that we thought was responsible for the oxidation of ammonia">, doesn't actually occur in aquarium filters at all.
I think that nitrification must produce some protons, whatever the pathway is, because you've gone from NH4+ to NO3-.Does the nitrospira denitrification still produce 2H+ through the process?
Nitrosomonas europaea is a bacterium that can derive all its energy and reductant for growth from the oxidation of ammonia to nitrite. The cell's demand for carbon has to be met almost entirely by the fixation of carbon dioxide.............Ammonia-oxidizing bacteria such as Nitrosomonas convert NH3 to NO2− by the successive action of ammonia monooxygenase (AMO) and hydroxylamine oxidoreductase (HAO): NH3 + O2 + 2H++ 2e− → NH2OH + H2O → NO2− + 5H+ + 4e−. Two of the four electrons return to the AMO reaction, and two are either reductant for biosynthesis or pass to a terminal electron acceptor (41, 83).
You need a reference for the <"Root effect">, the relevant component of the <"Bohr-Root effect">.All that to say, that's why I mentioned that maybe you have a higher O2 concentration in your tank because then the fish will still be able to respire without the higher concentration of CO2 messing up the function (if anyone has a link for how fish respiration works specifically with diffusion of oxygen over the cell membrane, I would greatly appreciate a reputable read).