More concentrated EI solution

[Crossocheilus]

For my 180L tank I dose macro at 90ml 3x per week as per tnc calculator. However this means that my 500ml solution doesn't last very long. Obviously I could just make a larger batch but I was wondering if it is possible to just make it more concentrated.

The mix is:

15g potassium nitrate
5.8g potassium phosphate
37g magnesium sulphate

In 500ml of tap water

 

[darren636]

Why not just add the dry salts to the aquarium
You'll need to work out how many spoonfuls of each powder.

 

[ian_m]

Hmm seems a bit of double dose levels, are you sure these are correct ?

http://www.aquariumplantfood.co.uk/fertilisers/dry-chemicals/starter-kits/ei-starter-kit.html
This quotes only 40ml 3x for say 200l, using approximately the same amounts as you.

 

[Crossocheilus]

Hmm ok you're probably right, I'll give that a go then, thanks!