Cuc for 155 gallon

[Robert59]

What is the rule of thumb as per how many pee gallon crabs verses snails etc...

 

[eatbreakfast]

Don't look for a rule of thumb for cuc, there are too many variables from tank to tank. Get a cuc that interests you, and get them as needed.

 

[Diesel]

Check out the site from reefcleaners.com you can find a link there that can help you out.
Also if you send john a email or shoot him a call he can advice you what to get as far your personal reef.