Using Instant Ocean Reef Crystals and sticking to it.
Have only All-In-One tanks or tanks with HOB filters.
Using various medias, Pads, Purigen, Chemipure, Chemipure Elite, Matrix, etc.
No sumps, no dosing pumps, no chillers.
Each tank looks a little different in biotope.
Very cool for a SCUBA diver and enthusiast.
Tanks all thriving. All packed with Fish, Corals, invertebrates.
Have survived 3 apocalypses that ruined my original attempts.
Two weather and power related, lost everything.
Another was the failure of a 30 Gallon JBJ Rimless tank that spontaneously cracked and created an emergency need
for a replacement tank.
What followed was the addition of 3 other tanks and a switch from 30 Gallon to 65 Gallon Red Sea Max 250.
My testing has gone from very frequent, weekly if not more, to rare.
Last full testing over 6 months ago.
Supplements are all hand dosed.
One tank - 30 Long Innovative Marine in office, gets even less done. Water change about every 2 months, about 15-20% (about 5-7 gallons).
Tanks at home get about 10-15 % water changes about every 2 weeks.
Autotop off with RODI - which runs at 3-8 TDS (usually around 3, starts at 0 and quickly goes to 2-4 on well water, within 40-60 gallons).
65 Gallon Red Sea Max 250 now complete, can't stuff it with any more corals. At least 19 fish in there.
Giant weeping willow fragged to 2/3 of original size back in March (to get ready for NY/NJ reefapalooza) got frags from 1/2" to 2" and one or two 3". About 18 frags in total. I've still got about 6 or 7 left. The mother colony is back to nearly original size in 6 months. Sand bed.
33 Long - Top tank of a stand is mostly a collection of anemones and growing out frags of GSP, Weeping Willow Toadstool, Mushrooms, Royal Green Crown Leather, an Eleganse coral, Zoas. Anemones from long tentacle green, Three Rose Bubble Tips, Two Rainbow Rose bubbletips, one Green bubble tip, one Acid Wash Green Bubbletip, multiple rock anemones. Barebottom. Stax rocks and some Live Rock. 10 or so fish in there.
33 Long - Bottom tank of a stand is filled with Pulsing Xenia, Anthelia, Torches, GSP, Zoas, Tyree Neon Green long tentacle Toadstool, Neon cabbage leather, Blue clove polyps, Mushrooms. Mostly all live rock - just 3 moderately sized pieces with some rubble. Bare bottom. 10 or so fish in there.
Fluval 5 Evo. Anthelia, Hammer, Arctic palys, Stardust palys, Armor of God palys, Monti cap orange, Neon platygyra, some yellow psammacora with long purple polyps/feeding tentacles, Nuclear green palys, mushrooms. 8 fish in there.
29 High - mostly a frag tank with a bit of everything. Hammers, chalices, toadstool, GSP, Zoas, Palys, Montipora, Red tabling milliapora. Bare bottom. 1 small yellow tang. Many critters with hermits, emerald crabs, snails, peppermint shrimp.
30 Long - packed full of mostly soft stuff, Zoas, Palys, Leathers, but have a few acans, a chalice, GSP, Hammer, Frogspawn, Candy cane, Favia and actually this tank, which I do the least on, is actually growing some SPS - Pocilopora, Stylophora and a couple acroporas. Sand bed. 12 fish in there.
That's what I've got running in my Hobby (now nearly 3 years into reef keeping and saltwater.
Add to that 9 Freshwater Tanks.
All told, time in hobby as an Aquarist - 53 years.
Lifetime member of the ACA.