I have it at 80 right now, just tested the water today and it wasn't horrible. Changed the carbon out and hoping that will get it levels out and I'm going to do a 50% water change this weekend. My fish are hating the 10 gallon that they're in right now
Try using Drylok next time. Use about 3 good coats. Its very durable and there is no "curing time" involved. And you can use the cement colors in it as well.
This is the 70 that I FINALLY finished.
Yeah, there's a lot of things I would've done different now, haha, but I'm planning on doing a small one for my 10 with an aio built into it for a nano reef. I will make sure a document that one better and write a post or blog up on it.