good or bad algae?

[Myka]

As much as inverts and fish do a great job of eating many algaes, your issue is with phosphates. Read the link in my signature to get that under control. In the meantime, some suggestions from the info you posted:

~ Try some Chaeto algae in the fuge (it is better at sucking up nutrients)
~ Don't add that many snails, that's too many they will starve after they eat the algae.
~ The algae that is in your tank isn't eaten by any of the fish or inverts that you listed.
~ Emerald crabs may or may not eat Valonia, but they are hit or miss.
~ The only thing that eats the red algaes are a couple different types of Tangs and/or Rabbitfish, but they are way too big for your tank.
~ Margarita snails are temperate, which means our tropical waters are too warm for them which increases their metabolism and leads to a shortened life span, which is cruel imo.
~ Don't add a blenny, they don't usually take prepared foods and your tank is too small to provide enough food for them indefinitely, so they will starve.
~ I find Astreas are good algae eaters, and would suggest 4 or 5 for your tank.
~ If you can find some Stomatella snails they are great because they breed in the tank and their population will flux in comparison to the amount of food available.

That's just my two cents on the matter though. Take it or leave it.