I haven't treated my frag sales as a business except record keeping for my own personal information so I could track my costs against sales to make sure I wasn't overspending on my hobby. As much as I'd love to make a nice amount of profit from selling frags in the evenings and on weekends, I'm certainly not there yet. My net profit overall from last year was only about $50 and I've of coarse already spent that on my tank this year.
I'm mainly trying to gage at what point is it typical to consider frag sales to be significant enough that I should be reporting the income as taxable income. My wife is in the process of starting up a small business making and selling candles which has got me to thinking about when I would need to treat frags as more than a hobby (at least in the IRS's eyes). I'm sure I could do quite a bit of sales before the IRS seeks me out, but would like to know the right way to do it.
From what I can find based off of the posts so far, it does seem that for "Hobby Income" you do have to report any profits as income, but can then deduct hobby expenses as well as long as they don't exceed the revenue at which point it would be a wash. In this case you'd not be able to use the excess hobby expenses to deduct from your other income, but could still be used to deduct from your hobby income. I'm finding a few places that say the total profits need to exceeds $400 or $600 before it needs to be reported at all.