Just to add to what Dan said:
-- no bubbler, not only is it not needed..the shrimp don't like all that water movement at all.
-- you can't just buy any macroalgae or Chaetomorpha species. My research and experience has shown that, at the salinity levels the Supershrimp are usually kept, only the Chaetomorpha species that I call "Supershrimp Macroalga" grows and thrives, even at very low salinities. The normal marine Chaetomorpha will just sit there and do nothing...and probably disintegrate over time. All other commonly available macroalgae are just gong to disintegrate right away, or not grow at all at best.
-- substrate does not matter. You can have any substrate that won't acidify the water. There is really no "best" substrate...I've used all kinds of substrates in the past and found no difference in suitability. The shrimp really don't care. I mostly use a type of very course sand now, though.
-- Any decoration is fine, as long as it does not release harmful chemicals into the water or acidify the water. That means..no driftwood or similar organic stuff, no leaves either. Just stay away from any organic decoration....
-- After you successfully set up your tank, you really don't need to worry about ammonia, nitrate, nitrite etc.. I have not measured any of these parameters in my Supershrimp tanks in years. Just observe the behavior of your shrimp (active?), the algae growth (to decide how much to feed), Chaetomorpha growth (ditto), and stick with the once every two week feedings, and you don't really have to worry about anything else. In short...just follow the advice given on the various pages linked here:
http://www.petshrimp.com/hawaiianredshrimp.php
If you follow that, you, and the shrimp, will be fine.
-- Mollies will eat larvae, juvies, and probably even most adults. With guppies you will lose all larvae and most juvies...and you won't ever see your adults out in the open. In other words, you won't ever be able to observe natural behavior. I don't recommend any fish at all if you want to observe the shrimp out in the open....and alive. In their natural habitats the Supershrimp have no fish. If fish somehow enter their habitats (usually introduced through humans), the shrimp disappear deep underground into the lava rock crevices, caves, connections etc.. They only come back out after the fish have been removed.
-- I have not tried any brackish species of Palaemonetes/Palaemon ("Ghost/Glass/Grass shrimp") with the Supershrimp, but I would think that they would go for the larvae and very small postlarvae if they have a chance...depends on the species. Brackish water ghost/glass shrimp are not commonly available anyway. The freshwater species of Palaemonetes ony have a limited tolerance to salt...they may be able to survive at the very low range of Supershrimp salinities.
-- There is really no average "setup" time for a tank before adding shrimp. It can take a few days to several weeks depending on your situation. Waiting one to two weeks should be safe for most people. With the Supershrimp Macroalga you can pretty much instantly set up a tank as the Macroalga takes care of ammonia and also introduces beneficial bacteria and algae from my breeding tanks.
Hope this helps.
