On the inexpensive end, Hydor Smart Level has been reliable. A little quirky once its low-water alarm is triggered (reservoir run dry) but not too quirky. Just reset. And it's 'looser' than I like, meaning it waits longer than I would like to bring the level back up, but at the price, and in a system that is forgiving, it's been a good ATO.
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Sk8r
Salinity 1.024-6; alkalinity 8.3-9.3 on KH scale; calcium 420; magnesium 1300, temp 78-80, nitrate .2. Ammonia 0. No filters: lps tank. Alk and cal won't rise if mg is low.
Current Tank Info: 105g AquaVim wedge, yellow tang, sailfin blenny,royal gramma, ocellaris clown pair, yellow watchman, 100 microceriths, 25 tiny hermits, a 4" conch, 1" nassarius, recovering from 2 year hiatus with daily water change of 10%.
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