Doubt it, mine wouldnt even touch the beetles for some reason.
You really need to use a stainless steel fly mesh. Not sure why you have used shade cloth, it may cause them to be colder and slower for longer. Mine used to love basking in the sun.
Stocking tool here http://www.aqadvisor.com/AqAdvisor.php
Maybe talk to the creator and maybe they would allow commercial use of it(though id remove fish that we cant get here). No point reinventing the wheel(and it will take you weeks of work).
Same situation for many fish, but a few people here have increased hardness of water with success.
Worth a shot for a few weeks if you dont find other alternatives.