I went with such a large tank because I know me. I may have 1 pair now.......but it won't stay that way, lol. But....even if it does I'm not concerned with them having too large of a tank to find food in. Plus...I already had the tank I just had to get the freshies out of it and convert it to SW.
1. I target feed them so there is no way they will starve. The eat PE Mysid right out of the ridged airline tubing. (someday they will lear that they can not snick it threw the tubing...they have to wait till it comes out the end. Silly horses) After they have gotten their fill and swim away I add a few extra pieces of mysis that they can "hunt for later". If they do not find it the snails and crabs do!I am also in the process of making a feeding station since I feed them in the same spot every day.
2. If you could see my Sea horses.......I mean sea PIGS...you'd know that they will locate food withing 10 miles. I have neve seen ANY fish eat or hunt food with as much gusto as thease two. I swear the beg for it as soon as the lights come on and are still begging after light out. My tang has nothing on thease two!!
3. With the size of the 45G High I can add more flow to the tank because there is more room to add multi spraybars. In the 20 G I have a few dead spots and I'm noticing a hair algae outbreak. I have reduced the lighting and I'm increasing the water changes to 2X a week untill it is gone. Right now there are only 2 spots of HA about the size a quarter each. Nip it in the bud before it get out of hand. (been there done that don't want to do it again)
The hard part is waiting the 4-6 weeks for the tank to cycle. If it takes that long. My 20G didn't have a cycle at all. I used water and sand and rock from my 125 reef and my 40G breeder tank. One can only hope.