I'm impressed that they provided a credit. At this point, I think all other retailers only provide a DOA guarantee on sensitive anemones like gigs, mags, and sometimes haddoni.
The reality is that when it comes to anemones -- particularly mags and gigs -- that it's buyer beware. We know that they are terrible shippers. We know that they are hard to acclimate. Yet, when the come up for sale, we always buy them!
Blue and red haddoni, though generally not as difficult, can probably be put in this same category. I've seen more red haddoni die than another other color. And blue ones are a close second.
I agree that in general LA DD is a really good source for livestock, but like all other retailers, that are not immune to the low survival rate of certain anemones.
Unfortunately, I really don't think there is an answer to what we should do in response to retailers using antibiotics. We really don't know if the cause of their demise once in our possession is a result of the antibiotics used prior. For that reason alone, we can't tell retailers to stop using antibiotics. As far as they're concerned, if they treat with antibiotics and the anemones respond to it while in their care, they think that they are helping. The reality may very well be that they are just prolonging the death of the nem. We can't tell them to adjust their protocols either, because as we've seen, even those that undergo the recommended 5-7 days of treatment still die, and some that don't undergo any treatment are acclimated without issue and thrive. Sad to say that we've got a long way to go before we solve this problem.