When adding a cleanup crew is it recommended to add them all at once or slowly add snails/hermit crabs? I currently have a 75 gallon reef tank with two clownfish. I wanted to add the cleanup crew and was wondering if adding 50 at once was a bad idea? Only reason being is I plan on ordering them and it'll be cost-efficient to get all of them at once.
Get em from reef cleaners.org and get a package of around 40% of what they recommend. They come with or without hermits.
If you put too much in they will starve, hermits will start eating snails, and then you get a nutrient spike from the dead. Which is the opposite effect you're looking for when adding a cuc. They will multiply naturally to equal the demand