Hanna reagents

[Spieg]

£15 actually, about $20 for 25 reagents

Is that all Hanna's pricing or is there some extra taxation happening here?

 

[Cryptocaryon]

£19 for 100 grams, there is probably much less that 1 gram of powder in each sachet so that is quite a saving

 

[taricha]

£19 for 100 grams, there is probably much less that 1 gram of powder in each sachet so that is quite a saving

you're barking up the wrong tree a bit here. Printing "Potassium Disulfate" on the packet is a red herring.

if you read the hanna site info for the ULR PO4 checker, it tells you...
"Method: adaptation of the Standard Methods for the Examination of Water and Wastewater, 20th edition, Ascorbic-Acid method"

poke around a bit and you can find the published method:
"4500-P E. Ascorbic Acid Method
1. General Discussion
a. Principle: Ammonium molybdate and antimony potassium tartrate react in acid medium with orthophosphate to form a heteropoly acid—phosphomolybdic acid—that is reduced to intensely colored molybdenum blue by ascorbic acid."

there's a lot more going on in those packets than "potassium disulfate"

 

[Reef.]

Is that all Hanna's pricing or is there some extra taxation happening here?

there is VAT of 20% (sales tax) on virtually all purchases.

 

[tomboys]

You bought it expensive. I have bought 2x25 for £20.75

I haven't bought them anywhere

 

[Cryptocaryon]

you're barking up the wrong tree a bit here. Printing "Potassium Disulfate" on the packet is a red herring.

if you read the hanna site info for the ULR PO4 checker, it tells you...
"Method: adaptation of the Standard Methods for the Examination of Water and Wastewater, 20th edition, Ascorbic-Acid method"

poke around a bit and you can find the published method:
"4500-P E. Ascorbic Acid Method
1. General Discussion
a. Principle: Ammonium molybdate and antimony potassium tartrate react in acid medium with orthophosphate to form a heteropoly acid—phosphomolybdic acid—that is reduced to intensely colored molybdenum blue by ascorbic acid."

there's a lot more going on in those packets than "potassium disulfate"

This is what i was looking for i was hoping Randy might chime in and say something along those lines. Thanks

 

[Cryptocaryon]

This is what i was looking for i was hoping Randy might chime in and say something along those lines. Thanks

Although dont they have to list all ingredients by law? Ammonium molybdate and others you listed are also hazardous you woukd think that would be listed on the toxicology report ( which it isnt)

 

[attiland]

I haven't bought them anywhere

Sorry I just went by the price you quoted.
So the correct response is if you decide to do buy look around properly as from £20.75 you have 50 test which almost a yearly supply if you check weekly. That is £0.415 per test ~ $0.58

 

[taricha]

Although dont they have to list all ingredients by law?

Apparently not. Not familiar with regulations, but it seems like they don't have to tell you what's in it unless it's harmful and there's enough there to require disclosure of risk.

Sometimes the listed ingredients are really not informative. Red Sea NO3 pro, reagent C powder that forms the final pink product, says "Sodium Chloride". Pretty sure table salt is not the chemically important part of that test chemistry either.

 

[tomboys]

Apparently not. Not familiar with regulations, but it seems like they don't have to tell you what's in it unless it's harmful and there's enough there to require disclosure of risk.

Sometimes the listed ingredients are really not informative. Red Sea NO3 pro, reagent C powder that forms the final pink product, says "Sodium Chloride". Pretty sure table salt is not the chemically important part of that test chemistry either.

I believe that they do only have to list harmful substances.

 

[LiamPM]

Depends on where you live. 6x the price per test is a heck of a lot.

You are in the UK aren’t you? Charterhouse are £13.99 for 25 reagents equal to 0.56p per test at that. And Charterhouse are one of the most expensive ones - I feel that’s not expensive in this hobby?

Or maybe this hobby has made me forget what expensive really is now days with it’s crazy pricing

 

[Dr. Jim]

Hi, I'm curious to know if the same reagent is used for the hanna phosphorus p04 checker vs the phosphate checker. It is listed on the package as "sodium disulphate" for the phosphate checker. Has anyone tried buying sodium disulphate in bulk and just measured the weight of the powder in the packets, im using quite alot and looking for a more cost effective way of doing it. Thanks

I'm not sure if this question has been answered yet, but Hanna answered me when I asked this same question and they said "No, they aren't the same reagents and cannot be used interchangeably." I asked this because I bought the phosphate reagent by mistake for my phosphorus checker. I tried using it anyway but got whacky results. So, unfortunately, they are different.

 

[tomboys]

You are in the UK aren’t you? Charterhouse are £13.99 for 25 reagents equal to 0.56p per test at that. And Charterhouse are one of the most expensive ones - I feel that’s not expensive in this hobby?

Or maybe this hobby has made me forget what expensive really is now days with it’s crazy pricing

Well pretty much every other brand works out as 10p per test (eg Red Sea, Salifert, Aquaforest) with a few up to 30p per test (eg Nyos), so 5-6x the price is quite a lot more expensive in my opinion.

 

[LiamPM]

Well pretty much every other brand works out as 10p per test (eg Red Sea, Salifert, Aquaforest) with a few up to 30p per test (eg Nyos), so 5-6x the price is quite a lot more expensive in my opinion.

Fairly - understand and makes sense.

I don’t test this much but I’ve always thought that even if I tested 6 times a week it’s still only £3-4. One of the cheapest costing things for my tank and one of the most important in the grand scheme.

See what your saying compared to others though. I don’t get on with the colorimetric ones at all personally. Too many brands have such a small colour change for such a large difference in number and I always struggle to decipher.

 

[Reef.]

You are in the UK aren’t you? Charterhouse are £13.99 for 25 reagents equal to 0.56p per test at that. And Charterhouse are one of the most expensive ones - I feel that’s not expensive in this hobby?

Or maybe this hobby has made me forget what expensive really is now days with it’s crazy pricing

Depends which po4 checker you have, the most expensive seems to be for the 774 and that is around £12.50, the others around the £10 mark.

 

[Reef.]

Sorry I just went by the price you quoted.
So the correct response is if you decide to do buy look around properly as from £20.75 you have 50 test which almost a yearly supply if you check weekly. That is £0.415 per test ~ $0.58

I’m guessing that’s not for the 774 reagents as they seem more expensive than the others?

 

[Dan_P]

Hi, I'm curious to know if the same reagent is used for the hanna phosphorus p04 checker vs the phosphate checker. It is listed on the package as "sodium disulphate" for the phosphate checker. Has anyone tried buying sodium disulphate in bulk and just measured the weight of the powder in the packets, im using quite alot and looking for a more cost effective way of doing it. Thanks

The ”disulphate“ is just one of the ingredients in the PO4 test chemistry. Your idea won’t work. Sorry

 

[attiland]

I’m guessing that’s not for the 774 reagents as they seem more expensive than the others?

Nope they are 774

 

[tomboys]

Fairly - understand and makes sense.

I don’t test this much but I’ve always thought that even if I tested 6 times a week it’s still only £3-4. One of the cheapest costing things for my tank and one of the most important in the grand scheme.

See what your saying compared to others though. I don’t get on with the colorimetric ones at all personally. Too many brands have such a small colour change for such a large difference in number and I always struggle to decipher.

I do colorimetric ones at work as well as I work in a lab and I'm fine with them, only Hanna Checker I've really looked at is the copper Checker.

 

[LiamPM]

Depends which po4 checker you have, the most expensive seems to be for the 774 and that is around £12.50, the others around the £10 mark.

Very true - £13.99 is the current price on Charterhouse for the 713 checker so is more expensive still though.

@ £12.50 for the 774 making it 0.50p a test seems good value for me still, it’s the one I use. I’d be happy to pay 0.50p per test for every element I currently test to be honest if it stopped me having to interpret those colours myself.