Epsom salt - confirming amount

[AloeRuss]

Hi

I started using Epsom salt again. 15 ml per gallon.
I have 55 gallon tank so it is a lot of salt.

Could you please confirm the amount for me. 15 ml is the most common but I found different so many variations I would like to confirm.

Thanks

 

[RedReign]

1/4 teaspoon per gal should be plenty.

 

[Snow Crash]

Epsom Salt is dry and should be measured in grams, not ML.
It is something like 9.8% Magnesium
1 gram is 1000mg and 9.8% of 1000mg is 98mg
PPM is mg/L
1 US gallon is about 3.78L

So, 15 grams of Epsom Salt per Gallon would look like
15g x 1000mg x 0.098 / 3.78L = 388.89 PPM of Magnesium

This is an absolutely insane amount of Magnesium.

Most plants require a nutrient solution with between 20ppm and 70ppm. A strong Epsom Salt dosage would be 2.7g per gallon, or about 1/2 Teaspoon per gallon. I usually use 1/8th a teaspoon per gallon for the 12-15ppm boost I get from that. Even that small amount can be a 50%+ increase to the element over my base nutrient solution.

 

[Dropped Cat]

I very much like seeing detailed, informed posts like this^.

Thanks for the time you took to post it.

 

[Ttystikk]

When I run Jacks Professional Hydroponic 5-12-26 the label recommends adding some .5-1g/gallon of epsom salt.

 

[Coconutz]

I hope you didnt feed that shit to your plants
The correct amount is 0g 0ml per gal until your plants tell you they need more than they are getting.
Peace

 

[solidsnork]

I throw a mcdonalds cheese burger in the bucket once a week. Those things are full of sodium. For my sulfur uptake, yup the eggs from an egg mcmuffin. High natural sulphur content. Put a grown man to sleep every time

 

[unregistered190]

Nice and detailed Snow

 

[RonSmooth]

How do you measure 15mL of epsom salt?

Anyway, if I were running a 55 gal reservoir, I would want to find a nutrient solution that contained sufficient Mg.

Dynagro has a product called "Mag-Pro" which is basically a "bloom" product with Mg & S.

 

[Buddler]

Convert, 5 grams equals one teaspoon approximately. Like Snow says that's a shitload of mag,it seems less is more in coco.. I been using around a quarter teaspoon per four litres.. greens em up nice plus sulphur which is good during flower..Bud.

 

[AloeRuss]

I have a shotgluss with ML measurements.
I did found dynagro at the store but salt worked better for me.
1 day and you see the change right away.

 

[reg24]

I've mixed my own salts for 15 yrs , and use .4 to .7 grams per liter as the only source of Mg
Your using too much , the ratio of exchangeable cations is important...

Reg

 

[Hottish]

Epsom Salts 0.125g/L is a good starting point