They recommend a year old tank..although ppl have done it with a "newer" tank, when I say newer meaning about 6-8 months old, but these are pretty much experts. It has something to do with the bacteria..Well anyway Seahorse.com is the place to look up anything and they sell them there too. Only captive raised seahorses, they do a great job and have a fourm where you can ask questions. They aren't cheap thats for sure, I think they get $169.00 for a breeding pair of mustangs. If you go on that site check out what they get for pintos..they are awesome, but I could never afford them.