Solid chunks in Micros mix

[Wet Elbows]

For a few years I have been using NilocG EI Based DIY ferts.

NA EI BASED DIY DRY TO LIQUID FERTILIZER SET

DIY EI Liquid Premium Fertilizer for Planted Tanks Do you want to dose fertilizers but the cost of liquid fertilizers is too high? Do you want to avoid going through the hustle of mixing dry fertilizers yourself? Then this is for YOU!!!!!! What you get- 2x 500ml dosing bottles (1x Micros, 1x...

nilocg.com

This is a kit that comes with a 500 ml bottle for both Macros and Micors as well as three sets of each salt mix.
Last week I mixed up a batch of ferts.
I sterilized both bottles in boiling water.
I used distilled water as always for my mix. I even heated up the distilled water before pouring in the bottles so the salts would dissolve better.
Everything dissolved fine with vigorous shaking.
The instructions for the Micros say there is a possibility it may grow mold and so to prevent mold the offered solution is to add 10ml of Excel or store the Micros in the refrigerator. I opted to keep them in the fridge, why would I buy a bottle of Excel just to use 10ml?
The problem is, and this has been a recurring problem, the Micros seem to turn back into solid chunks. I mean I have particulates and larger solid pieces in the Micros mix.
I can't help but feeling my plants are missing out on nutrients when everything is not totally dissolved in the water.
Any thoughts? Any similar experiences? Any solutions? Should I just switch ferts?

 

[gnatster]

I'd mix a 50% solution and double the dose.

 

[Wet Elbows]

I'd mix a 50% solution and double the dose.

Unfortunately that's not an option at this point. All the salts, both Macro and Micro come pre measured and pre packaged to add to 500 ml of water.

 

[Pepere]

Unfortunately that's not an option at this point. All the salts, both Macro and Micro come pre measured and pre packaged to add to 500 ml of water.

Buy a 1000 ml dosing bottle.

Or mix it in a liter bottle jar and decant off into your dosing bottle…

 

[Wet Elbows]

Ah ha. I think I have a 1 liter bottle lying around somewhere.
I also found these on Amazon.

https://a.co/d/06exvQcP

According to the second photo it also comes with a neighborhood barbecue party.