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Old 12-22-2004, 08:59 AM   #1 (permalink)
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Default Brighty K ...useful or not so useful

While the rest of the Brighty series looks tempting, I am a bit leary with Brighty K. As far as I can tell, this product has only 2 fuctions: 1) potassium source. 2) Chlorine neutralizations

Potassium is one of those extremely easy to purchase items in the US. It is cheap and also easy to dose.

While chlorine neutralization is important, it doesn't say (and this is very important!!) is if it neutralizes chloramine. I know that chloramine is widely used in the US instead of clorine and it is something that needs to be neutralized.


lets suppose that it does neutralize chloromine, given how readily avalable water conditioners are, and the situation with K in the US, is there anything else that brighty K offers?
Potssium sulfate is only 2.17/lb and you can get a 1gallon jug of amquel for ~$30.


I really like most of the ADA ferts and substrates, but this one is very iffy for me.

Anyone care to offer additional info/comments?
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Old 12-22-2004, 11:25 AM   #2 (permalink)
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It's simply a source of potassium, nothing special about it.

If you're not so sure about the chloramines, why not stick to Prime?
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Old 12-22-2004, 11:52 AM   #3 (permalink)
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I switched from Amquel to prime because amquel has some extra goodies in it I don't care for... they claims it binds heavy metals...? Dunno about less is more, right? I don't want or need that function, it may just be marketing fluff but if it does something I want it away from my traces
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Old 12-22-2004, 12:13 PM   #4 (permalink)
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To my knowledge there is nothing special about Brighty K, it's just the ADA offering for a K supplement. Some folks like to use all of one brand/keep it consistent from that standpoint. To others that's not a big deal. Perhaps for a beginner it could be easier to have a consistent system of dosing between different supplements. I was using both Tropica Master Grow and SeaChem FlourishPOTASSIUM together at full strength because I had not cross-checked the amount of K in the Tropica MG. I found by adding both at recommended dosages I was overdosing K. Just an example; I think most are hip to checking for such issues and I was probably the dummy on that one. It can happen, though.
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Old 12-23-2004, 12:06 AM   #5 (permalink)
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Don't worry Jeff, K is hard to overdose. There's no recommended dosage, I mean Equilibrium gives me 50ppm of K every water change.
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Old 03-31-2005, 09:35 PM   #6 (permalink)
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Quote:
Originally Posted by Gomer
Anyone care to offer additional info/comments?
I'll just throw in some info I came across. It was translated for me and I'm going by memory as it was told, so take it for what it's worth.

According to this site Brighty K is created from potassium carbonate that is naturally extracted from trees.
A little pH rise is normal using this product, perfectly understandable since it has carbonates, and pH will eventually return to normal due to the plants. Standard dosage is 1mL per every 20L, or to neutralize chlorine 5ml per every 10L. My friend was a bit confused here b/c it says the normal dosage also neutralizes chlorine. There was no mention of chloramine. Also mentioned was the adverse affect on [Yamato?] shrimp if dosed high; limit dosage at 2x-3x the standard amount and monitor shrimp. (end translation)

The chlorine neutralization is likely due to the carbonate. Chlorine in water is hypochlorous acid, carbonate is a base, and acids and bases neutralize each other. I asked a chemist for a second opinion, and even though he hasn't seen this reaction in literature, chemically it makes sense. Anyhow the chlorine neutralization is just a cool side function of this fert. If you're worried about chloramines Gomer, redundancy with a dechlorinator will give you peace of mind.

Two things intrigued me about the above info. The amount of carbonate added can be deduced by a KH kit or pH change...thus possible to find exactly how much K a dosage of Brighty K adds.
Folks from Singapore with softwater using Aquasoil have their pH's lowerd around 5 without CO2, yet Amano in Japan also with very softwater maintains pH's no lower then 6.6 with CO2. Its must be this small daily amount of carbonates from Brighty K that keeps his water well buffered, balancing the effects of Aquasoil. So, Brighty K...useful beyond a potassium fert? Perhaps so...

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Old 04-01-2005, 06:07 AM   #7 (permalink)
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Amano/ADA also uses regularly Penac P - which is comprised mostly of calcium carbonate. It is added to the substrate of a new layout and then the water column about every 4 weeks.
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Old 04-01-2005, 07:08 AM   #8 (permalink)
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I'm going to try dosing my K from Equilibrium instead. K, Mg, Ca, Fe all in a balanced form is a nice thing
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Old 04-01-2005, 08:37 AM   #9 (permalink)
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Ok, well, we can work out an upper limit here if we assume 2 things: 1) that the onlything in brighty K is Potassium Carbonate 2) the solution is saturated.

K2CO3 has a solubility of 147 g/100 mL
Brighty K has a dosing schedule of 1ml per 20 liters.

This works out to 1.47g per 20L or .0735g/L or 73.5ppmK2CO3 or 147ppm K

Obviously Amano won't dose this so I guess we do have to measure the KH LOL. I was just trying to be sneaky about it and it didn't go my way....so...any one with Brighty K, please get us some KH data ...say...1mL Brighty K in 1L of DISTILLED/RO water


Just for perspective, K2SO4 has a solubility about 12g/100mL or~ 10x less.
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Old 04-02-2005, 01:34 PM   #10 (permalink)
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Anyone know the difference between Penac P (plants) and Penac W (aquarium)?
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