It must have sucked to have lost an arro. I am paranoid about going anywhere on vacation because I don't trust anybody to look after my animals.
Yes, I used to have to do 30% water changes twice a week (using a python) and I used an Aqua Ultraviolet Ultima II 2000 pond filter with a ReeFlo Barracuda pump. I had a pair of breeding motoro that bred 4 times before the city killed them off. I also had four peacock bass that grew to quite a large size (16") and a large knife fish (24"). I also had a mixed marine tank with a Yellow Tang, French Angel, Queen Angel, Flame Angel, a couple of clown fish. All perished the same time as the rays. I figure I lost $10,000 worth of fish that spring, nearly wiped everything out. Now I just have a Lionfish and a Blue Damsel in the 200g tank with a few mushroom corals.
Lately I have been down sizing to just four tanks (270g arro, 200g salt, 165g arro, 130g 2 turtles). It is just too much work and I have been doing it for 25 years now. Plus I have a red leg tortoise in a 150g plywood tank and two tanks with snakes (2 ball pythons and an emerald tree boa). I also used to have a panther Chameleon for a few years but he passed away a couple of years ago.
So there are still a lot of tanks and enclosures in the house. A few years ago the local elementary school brought their kids one class at a time to tour my house. I guess I am the towns unofficial zoo.