i've been reefing for about 5 - 6 months now with a small 1ft cube and the poison got me and i upgraded to a tank 8 times larger. Tank size : 120x60x36cm (12mm rimless) Sump tank : 35x50x45cm (6mm) Skimmer : Deltec MCE 600 Lighting : Maxspect G2 170W (26 white, 22 RB, 8 Violet) Return pump : Eheim 1260 Chiller : Teco TR15 Substrate : CaribSea Special Grade reef sand (40lb) Wavemaker : Jebao WP-40 filtration : 30kg Live Rocks, Rowaphos (with TLF reactor), biopellets and chaeto