So right now they are very small, no where near 12". The smaller male i was worried about is now a tiny bit more active. I'm still a bit worried but he came out from hiding, it was quite brief but at least it was an indication of life.
The female seems to swap between hanging out right by both of the males and they get more active when she is around. She by far seems like the most healthy she is swimming about quite a bit.
I think I am going to keep them in this tank and prep a bigger one. I was thinking of trying to swap them over really quickly but seems they are getting more active I would rather get a new environment setup properly and not take a risk.
A few more questions (totally appreciate all the help by the way)
1. When you setup a new tank how long do you recommend to have it running before introducing the seahorses?
2. If they get sluggish and i give them live food will that cause problems with giving them the frozen food? I've just done another feeding and they seem to respond quite well to the frozen food but was thinking of giving live food a try.
3. If i put live brine in the tank will they get sucked up by the filter and end up rotting and causing problems?
4. The store told me because it's winter and even in summer i likely wouldn't need a cooler but i am thinking that was bad advice. It's hard to keep the tank a consistent temperature. Even if i keep it cold the temperature fluctuates so I am thinking I probably need a heater/cooler to stay at a constant temperature. Anyone that has had cold water seahorses might have some good tips on this. In hindsight i wish I went for a warm water breed but i am totally hooked on these guys so am just trying to do what makes the most sense for them.