Aqua essentials and Greg Watson will be selling the KH reference solution soon

I just sent out the info for both Greg Watson and Aquaessentials to see about them selling the KH solution for folks.

You add 3.484 liters of DI water to this 10mls smpale to get 4 KH(total will be 3.499liters).

If you miss the milliliter volume by say 2 mls, you will get an error of about 0.02ppm of alklalinity.

I'd suggest buying a 500ml volumetric flask(run about 5-10$ on ebay etc), making up a batch, use 7 full jiggers of the 500ml flask, take out 16mls with a small cheap pippette as best you can. Place the stuff you plan on using in the 500ml flask and keep and use from there.

The rest of the 3 liters, store in a sealed jug, milk jug etc and clean it out really good. Fill up when you need more or sell off.

Note, this will last about 26 years per drop checker, based on 2-3 week use and 5mls used each time.

You no longer need to do pH test kits(other than filling once a week) or KH measurements. You get a lot more information out of the pH test this way as well, you see the pH change/CO2 all day and night long, not just one mere snap shot in time!

Regards,
Tom Barr

 

End of the month for the USA. Depends on Richard for the UK.

Regards,
Tom Barr

 

Sure Vaughn, that will work, but you need to get 10X more accurate for 339.4 mls.
For 4 KH from 40 KH, you'd do well stick to unit of 10. So 10mls of 40 KH in 90mls DI will = 100mls of 4 KH.

For those that like math:

Dilution Equation: M1V1 = M2V2

where M1 = Molarity of initial solution, V1 = volume of initial solution to be used, M2 = Molarity of final (diluted) solution, and V2 = desired volume of final dilute solution.

Here's a how to make dilutions link so you can check whatever stock solution you want to dilute to and it's fairly simple for the average hobbyist:

Serial Dilutions Made Easy

Resource Materials: Making Simple Solutions and Dilutions

The most common problem folks do: add 10mls ref solution to 100mls of DI of the stock solution rather than 10mls of ref solution to 90mls of DI water.

Dilutions: Principles and Applications

Diluting and Concentrating

Now you may all note, it would be painfully easy to make a simple dosing calculator to run any desired volume and the output would yield the final concentration.

Perhaps some wise soul will add this into the dosing calculator here?
Using this science lab tested verified sample is ideal for consistency and it;s easy to ship and relatively cheap(about 12$ which makes 3.499 liters worth of 4 KH solution).

Note: this is really no different than the dilution factors with EI dosing, we just use the tank itself and the remainder of the water after a water change and dilute that to get the max build up possible and add the ferts after.

Regards,
Tom Barr

 

The other tip: when adding this solution to the DI water etc, make sure you rinse the container that the KH solution comes in with the DI water you are using for the 4KH solution or stock solution.

That way every last bit of the KH reference solution gets into your dilution with DI water.

Regards,

Tom Barr

 

Vaughn, since folks will be buying this and using your basic idea and you being the main proponent and all......

Perhaps a nice short and simple article about it and the trials and tribulations you have learned upon this path would be appropriate?

I would love to see someone do a dosing calculator for the dilutions.
I can provide any sampling methods, where to get the Volumetric flask and their advantages to measuring liquids toi a high precision and how the methods learned in this, may be applied to making any set of reference solutions for verification of any test kit to a high degree of accuracy. I'll also write a bit about the advantages of going big with volumes and the degrees of accuracy you can gain..
We should all pull together on this one and make this happen.

It'll standardize a burning issue that's been going on for many years, too many.

Giving advice use to be 60-80% game.
I noticed that 90-95% of the issues started appearing to be CO2 related, then I asked why. Folks had 200ppm and had no issues with fish and they have no wood or peat etc added.


This is the last real nail in the coffin, there will always be a small %, maybe 1-3% that will always follow Murphy's law till the bitter end(you know who you are )

But making it understandable and the concepts true benefits is key.
I would like to see a nice standard ref solution make it in this hobby like KNO3, etc.

I know this will help the hobby, make it cheaper, more successful, make us equal all over the world and using the same methods, same chemicals etc for cheaper than any company brand.

There is also a chance that both Richard and Greg will sell the dilutions already done. 500mls of a KH 4 for say 8.99$ and a bottle.

It's really up to them how they want to sell it.
They can dilute or sell the concentrate.

They would have the buy a bottle to go with it, and I know just the bottle, they are like the TMG, the squeeze disperser 500ml/16oz jugs. These are very nice for dosing Traces or other things after you are done with them BTW.

500ml would last you 3.8 years and would require no volume measuring of the dilution etc. Weight is a shipping issue also.

Thoughts?
I want to get this squared away before they start selling it.
Also, the pH color injdicator is certainly not a perfect reagent set that you buy for 6$ etc either, that is the Achillies Heel in the the drop checker system then.
Everything now hinges on that piece of the puzzle. We can assume it's correct, but the range of accuracy is so poor vs a pH meter, I do not think it's an issue personally.

But getting a decent narrow range pH indicator might be something else to check and focus on that's consistent with everyone.

That may be bought in bulk also, you do not need to buy aquarium test kits for that in other words

I suppose they may want to sell that along with the Reference solution.

Regards,
Tom Barr

 

Good points on the pre mixed versions.

I think 500mls/16oz is fine then for 4 KH.
5 KH is fine also.
And a 40KH also.

That and a supply of the pH indicator to go along with that.

Regards,
Tom Barr

 

They can sell the bromo blue, the best narrow range pH indicator for our target range for a few $ for 1oz amouts or buy a 500ml for say 15$ or so.
500mls = to about 10,000 drops, or about many many years if you use 3 drops each time every 2 weeks.

If you have a few tanks, that might good.
If you have one, the 1oz amount ought to do it.

29mls = 1 oz, so that's about 20 drops per ml and 580 drops.
3 drops every 2 weeks/year = 22 years.

Regards,
Tom Barr