Dave that sucks dude. I was in the same exact boat as you, I had bubble algae everywhere! Before I did my tank upgrade, I CAREFULLY inspected every single frag. Those that did show signs of bubble algae were carefully removed/scrubbed and rinsed in three separate containers before transferring the frags into the new tank. The frags that showed heavy signs of bubble algae were even dipped using hydrogen peroxide. I've struggled with bubble algae in the past, one thing I knew for such was that I didn't want this headache with my new build. Fast forward into the future and my expensive ceramic pillars were TOTALLY covered in bubble algae. I was furious! Anyways, now to the solution. One thing that I've learned was that it's impossible to avoid bubble algae, its just inevitable. Most important thing is to keep up with your water changes. You'll be surprised how much this simple task can help. I'm not recommending the water changes to help reduce phosphate, but rather to eliminate free floating spores. Take a long Sunday afternoon and manually remove as much as possible, follow up with a big water change (25% or more). This is exactly what I did, but unfortunately I was still left with plenty of bubble algae from hard to reach places such as caves or tiny crevasses. The next step I did was operation emerald crab. I took a medium size rock that was COVERED in bubble algae and I placed it in a bucket with a heater and pump. I purchased 6 emerald crabs and placed them in the bucket. My goal was to see how efficient emerald crabs actually are and also to pinpoint which crabs where actually consuming the bubble algae. After about 3 weeks time, I was left with 3 survivors. I never feed the emerald crabs, I figured the crabs that stayed alive where the crabs that ate the bubble algae. After the experiment, I placed the three remaining emerald crabs into my DT. Fast forward three weeks and my tank was looking spick-and-span, I'm talking about not one single bubble!
It totally sucks struggling with this mess, but don't get discourage. Hope this helps
Jovany