No cus its not like petco bought out LivEaquaria against they're wills.
The same people who built LiveAquaria were comfortable selling the business they'd owned for 31 years. Check this thread and take a few seconds to do some Googling.
The people who run PetCo are very good at what they do. I don't know why you think they'd drop tens of millions of dollars on a well-loved brand only to turn it into a brand that the internet openly hates.
I kinda feel the same way. 100% speculation here..... But the only scenario that makes good business sense to me is that Petco realized that they were hated and avoided by the marine hobbyists and decided to fix it.
Buying LA seems like the quickest way to gain control over the supply of livestock to Petco, not to mention with e-commerce growing by leaps and bounds the acquisition makes sense, it grows there market share.
Also why be the middle man in online aquaria retail when you can become the supplier and also use the purchase to improve the brick and mortar part of your business?