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EI solution shelf life?

CeeJay

Member
Joined
3 May 2009
Messages
945
Location
Surrey UK
Hi all.
Couple of quick questions about EI.
1. Do my 2 mixed solutions of NPK & Trace have any recommended shelf life?
Just need to clarify in case I get strange things growing in them if I mixed up a big batch.
2. Do I really need to use DI or RO water for the mixture?
I'm currently using tap water but have seen no negative effects so far. (I've probably answered my own question with that statement :oops: )
Please forgive my newbieness.
Thanks in advance.

Chris
 

ceg4048

Expert/Global Moderator
UKAPS Team
Joined
11 Jul 2007
Messages
9,224
Location
Chicago, USA
Yep Chris, you've answered your own question. Congratulations! :D There no reason to have negative effects using tap water so why pay for special water? If you're collecting RO to use in the tank anyway then you can certainly use this but why bother? There is no advantage one way or the other.

The powders themselves have no shelf life dry, but in solution you might get mold/fungus/bacteria over time if the liquid is exposed to heat and light. That's another reason I mix only one month batches. Avoids that issue entirely.

Cheers,
 

CeeJay

Member
Thread starter
Joined
3 May 2009
Messages
945
Location
Surrey UK
Another little bit learnt. :D
Thanks Clive. Your help has been invaluable.
My current batch was made up for 1 month so it looks like I'll stick to that measurement for all future dosing.
As you once said, it's as simple as putting sugar in your tea, and I make a lot of tea :lol:
Once again many thanks.

Chris
 

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