Sidius,
If your ATO float switch failed in the "open" position, wouldn't it keep pumping water from the 29g and then the float switch in the ATO reservoir would refill, so you'd overflow your display/sump and drop the salinity? Also, if the float switch in the reservoir fails, you have freshwater all over your main floor. Neither scenario would please your wife or you.
I really like Reef Pilot's setup for failsafe, foolproof ATO system, cause having it timed (5 min every 6 hours) will really minimize any excessive RODI water dumpage, either into the display/sump or your floors.
Another note I tell newbies is that reefing is as much an art as it is a science. We've all known or read about people with all the latest gizmos who can't keep corals/fish alive and others who use the most basic system and have thriving tanks. So if anybody tells you its "his/her way only", then runaway.There are a lot of ways to achieve success in reefing, but most of it involves spending the time to learn, to keep track of what your livestock are doing, and to having the patience to not rush and make sudden changes.
If you're into sps, what I've noticed is that low bioload is one common factor in many really nice sps setups. The owners chose a few fish they really like and didn't overload their systems with a lot of other fish. Low bioload keeps it easier to maintain high water quality. High bioload is possible, but means you have to keep on top of things. As others have mentioned, and you already seem to have found out from your research, Achilles & Powder Blues are very much ick magnets and can be real difficult for even experienced reefers to keep alive and ick-free. The Achilles comes from surface areas of the Hawaiian reef where there is extreme wave action and high oxygen levels (according to my friend who snorkeled all over the Islands). I think that is why so many die in captivity. Achilles generally like to be the only tang in the tank. Powder Blues and Achilles will break out with ick at the first inkling of stress, such as you look at them funny (ok a bit of an exaggeration but NOT much). Neither fish are really suitable as "first" fish for newbies.
I also really like your small daily water change idea. It's something I would do in a heart beat if I had the space, but I don't. My wife would kill me if I took up more space in our limited living area for an auto water change system.
Anthony
Last edited by SeaHorse_Fanatic; 10-07-2015 at 08:46 PM.
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