http://macro-algae.com/
this seems to be the most common out there rigth now im tryin to find a name for the thick green coral looking plants i found
Red Gracilaria Macro Algae - A Superior diet for Tangs and Angels!
Red Gracilaria Macro Algae, sometimes referred to as Tang Heaven, is the thin branchy Gracilaria Tikvahiae. This macro algae is a very appealing addition to your saltwater reef tank. It's very durable and will thrive under most lighting conditions. This is the most natural and extremely nutritional seaweed diet for all tangs, pygmy angels and the popular ornamental surgeonfishes. There is enough in this portion offered to feed a couple of good sized Tangs for a month. The Gracilaria Macro Algae is also known to combat, prevent and cure head and lateral line erosion disease. You can add directly as food to your main tank, or grow it in your sump or refugium as a living filter to remove ammonia, nitrates and phosphates. Studies have shown macroalgae biofilters are able to help stabalize the pH of the water and also aerate the water in the integrated system. Macro Seaweed draws an extraordinary wealth of mineral elements from the sea that can account for up to 36% of its dry mass. This percentage offers a wide variety of minerals, i.e. macronutrients such as sodium, calcium, magnesium, potassium, chlorine, sulphur and phosphorus, as well as other trace elements essential for avoiding deficiencies... and these elements include iodine, iron, zinc, copper, manganese, boron, nickel and cobalt. Two of these elements are particularly valuable, (i.e. iodine and calcium), both of which are sorely lacking in most captive fishes diets. Gracilaria Macro Algae is the richest plant sources of calcium. A great buy, especially if your interests are in improving the overall health of your fish, which will be evident in thier increased weight, brighter color and the healing of lateral line erosison.
Macro Algae Price: $11.99 - (5 ounces)
Shipping Cost Only: $6.85 -(USPS 1-3 days service)
Total: $18.84
that was taken fromt here website may also try....
http://www.algaebase.org/ and search images in florida i can find most that (obviously i cant find the ones under microscope)