So, I know many people use Miracle Grow Organic Choice (MGOC) potting soil for dirting tanks. I've heard it's mostly because there aren't as many floaty wood bits to get out.
But what other soil options are shrimp-safe (invert-safe) and successful?
Can any potting soil be used if sifted?
For instance, reading the back of the potting soil I just got for my balcony container plants, even though it's branded with scary words like "feeds for 6 months" and "moisture control" the actual fertilizer components listed look fairly routine (although some are "polymer coated" for the slow-release) and there's no mention of added trace elements or metals, basically only NPK.
Is it legit to worry that the peat, coir, etc. might have come from pesticide treated areas and bear traces of those or of metals (like copper) or is it probably "safe" to use non-organic as long as one sifted out the big and floaty bits and extra fertilizer balls?