Thanks Every one for you input.

It is do-able but with a close watch on perameters.
What whould be the best seahorse to suit my tank, reidis or kudas?
How long should I have tank running be for adding seahorses?
What kind of macroalgae?

Bump

Young tank raised are your best bet. Small size to fit the tank so they can have a little time to grow up in it. Reidis are more colourful, but also more expensive than kudas. It is also harder to raise Reidi babies.

Remember, seahorses eat alot (should be fed at least twice daily with good quality mysis). They will increase the nutrient levels in such a small water volume. Any way to either up the display or sump size?

For macro, I love using red grape, red halimenia, and prolifera. All are blade or tall branchy types of macro.

Research on seahorse.org as well. They are cool (my favourite fish) but high maintenance fish, especially in a small system.

Anthony

Cool thanks alot for your help.
Unfortunatly cannot increase size of sump or display with out replacing everything. Sump is custom made to fit inside of the stand.