Well I don’t think any of our vendors would bother with ordering ghost shrimp unless you were ordering like 500,000 (feel free to contact them if you wish though) so I’d start looking online and contacting sites that sell ghost shrimp asking about ourchasing whole sale. Or you could skip out the middle man and figure out who their wholesaler is and go directly to them as you’d get a better price from them.
Also I’d get your own test kit instead of relying on petsmart to test the water.