Ok PPl so i decided to go biger and buy a TL550(thanks Furbz-ps no heaterwith the tank??) What a mission let me tell you Ok so what i did was take all the water from the TL 450 and put it into the 550 and kept the heater and pump Running in the bigger tank. I then added (kinda slowly) 70L of RO saltwater into the tank as to start cycling also added some of the playsand that i had in the 450 just to start things up and as not to get rid of all the "goodness" that the substrate was holding. I know that this is gonna throw my paramaters around but the 2 x clowns ,puffer fish and hawk fish seem to be loving their new home My Xenia and elephant ear are slightly upset but seem to be getting better by the day .. Any suggestions to speed up the cycle and get my prams up quciker? so its 55L of water that was in my old tank and 70L of Ro water( this was probably a stupid thing to do- but all seems okay) Will try post pics Tomorrow.