Always gonna give you shout outs Jon, we love what you do.
Ashley, yes blue/green colored juices have dyes in them, any unnecessary additive is going to have negative effects. It's fun and cool but is it worth it? ehh up to you. When the colors are red/yellow/brown they could simply be from the flavorings so you don't have to worry about those, it's mainly just that blue/green, though there may be some others, those are just the ones I know about and I know I've had those other 3 colors without dyes.
That said, about the juice you buy, might be worth looking online, much like the batteries you can find some solid juice for a fraction of what you're likely paying. I get my juice usually in bulk so I pay even cheaper but to put it in terms of 30ml's I pay $4.37 (I buy 240ml or more at a time but 240ml from my supplier plus shipping is $35, not including their frequent sales which slash up to 40% of the cost) compare that to what many shops charge ($15-25 per 30ml) and yeah, savings! Downside is you have to find a flavor you like and that takes some time (I went through probably $60 in sample packs till I found a solid 5 flavors I loved). Anyways, thought that might be worth mentioning.
As far as your battery it's hard to say. They're rewraps, consistency and is always a question. That said looking it up what you have is realistically a 15+ amp cell, so don't push it too hard, what wattage setting do you use? What coil resistance? A little math should tell you if it's safe but best bet is to assume it's a 15 amp cell and try to stick to that. And yes, you're doing the right thing, monitor your battery, hell even open it up every once in a while and just see if it's warm at all. 80 degrees celsius is the point where you should start questioning it.
https://www.e-cigarette-forum.com/f...lts-only-a-17a-battery-damaged-at-30a.718006/
Tests done by Mooch, like Jon a trusted and loved Battery expert. But, to sum it up, they lied, a lot. Like I said he found it to be 15+amp cell.
I'll try to tone it down but I think you can understand our concerns about these types of companies, they label to what people want but don't have the quality to back it up, it's dangerous. Thankfully regulated mods are around and they help keep people from having a bad time but it's a scary thing. Thankfully we have places like these forums and people like Jon and Mooch who will educate us so we can pass it along (feel the need to pass along a thanks from a friend, because of the info I've gotten here I was able to subdue his girlfriends fears that he's going to blow himself up).
So yeah, if you're not pushing the wattage and not using low resistance coils you're probably fine. Basically don't use below .3Ω and max out your wattage. If you're using the .2Ω TC coils stick below 45watts in power. If you want to max the power stick above .4Ω. You should be good at that with the battery you have. Of course on a regulated mod they do a lot to protect you, but trusting machines is a bad idea, we've all seen Terminator right?