55 gallon pony tank

[tgoeujon]

not started yet but im thinking in the near future of setting the 55 back up for seahorses and pipefish. i dont want to have a tank filled with liverock and the tank isnt drillable, so unless an overflow is possible i cant run a sump. could someone suggest a good overflow to try or possibly give me an idea of a reliable DIY setup? ive got everything i need to set up so if the overflow is easy enough i could get it started right away.