[benjuanman]

Hey guys been trying to chase up some 40-85% phosphoric acid to make some pH down adjustment fluid. Been using sulfuric acid diluted with distilled water for a while now and just about out. Spent hours searching the net and can only find shipping containers worth of it. So any help would be appreciated, also if you guys have links for some sulfuric as well as the phosphoric would be great too.

[Rumblefish]

Bunnings or maybe Auto shops sell it as rust converter ...just went and had a look at my bottle its call Ranex Rustbuster I got it from Bunnings I had to look around for it, it wasn't on the shelf with the other acids that's all I can recall

yes, rust converter!

these vary in percentage of phos acid.

friendly spraypainters might put some in a jar for you.

depending where you are friendly cattle farmers might do so too (they use it with molasses and urea to feed their poor fucking lot-fed cattle).

watch out the rust converter you choose doesn't contain other additives.

cheers!

[Littleleaf]

check your local steal/iron supplier.That's were I would get it for the custom iron work I would do.

[dalilguy]

why give your plants more phosphorus?

https://www.ebay.com/itm/Concentrated...item41643a09cd

Sulfuric acid works good an gives your plants a lil extra something besides phos.. You can use batt acid from the auto parts but it isnt as concentrated.

Remove 950ml of water from the gallon. add the Sulfuric Acid SLOWLY to the rest of the gallon. It will last you ages.

[Hammerhead]

I have been using this place for a long time for chem supplies.. It's not cheap. 160$ for
1g. This is CleanRoom MB Grade acid. Dont know what the shipping procudure is or if they even ship. Since your in another country I dont think this will work. I would just use H2SO4

https://www.labproinc.com/index.php?o..._id=6&Itemid=1

[4tokin]

go to your local hydro shop and they have bottles of PH adjusters both up and down

[benjuanman]

Originally Posted by 4tokin

go to your local hydro shop and they have bottles of PH adjusters both up and down

Yeah mate I won't pay $25 for a litre of "homemade" pH down. Which is what they sell from where I'm from it's just phosphoric acid watered down and re bottled with the shops name on it.

Thanks for all the other suggestions guys now to daliliguy (sorry don't know how to multi quote) the reason why I wanted to change to the phosphoric is that I read somewhere on here that it's more stable then sulfuric. I've still got about 500ml of 403g/L sulfuric acid so won't need any asap but don't want to get caught off guard and run out. I've found a place that sells 2.5L of 85% phosphoric acid for $60 which is food grade. Also waiting on email from a cleaning place that has a citric acid product with no other active ingredients from what I could gather. Like I said need more info from them first.

Also regarding the metal cleaner/ rust remover found one on ebay but was only 20%. But like you said Sat x RB alot of them have some type of degreaser.

[Elmer Bud]

G`day Benjuaman

I got mine at the local pool supplies shop.

EB .

[JKD]

Super Phosphate diluted in water works just as well and is cheap as chips.

JKD