Looking great!! It is a great sign that they are eating. My current seahorses are on the white side and are doing well. Keep a close eye on them and check the bodies for signs of disease like teeny bubbles on their body, which can be a sign of gas bubble disease. Also, check their snouts for snout rot.
Thanks guys! Every day they are more active. No signs of any problems so far.
I did add a maxijet prefilter to my HOB filter and it must have burned up the motor: it wasn't even very dirty. Need to get another today, but testing to make sure the live rock picks up the slack too. I use the same sponge prefilter on my chiller pump but I guess I'll have to find something else for the intake pipe of the HOB.