Bart seahorse needs a good filtration and needs to be feed 2x a day. With dwarf seahorse need to feed live brine shrimp everyday. And needs at less 30gal for a pair of ponies.
I do add chaeto to add more pods for them to eat. But not everyweekend. I would go with nano fish like 2-4.
The tank looks good. Can't wait see what you do with it.
Zef