Thanks Whoyah.
The seahorses hitch to the macros now. I was thinking of adding a large fake coral for them to hitch to right in the middle of the tank untill the macros grow a little taller. I plan to add some more macros. The Red feather kelp will go in the middle and it grows very tall. Sadly, the red feather kelp is expensive. 30.00 for a small frag. If I want a nice long piece it's gonna cost me a lot more.