Hi everyone, as per the advice give on some members of this forum I've decided to upgrade my 24l tank to a 60l one. I have troy, a male betta and 6 neon tetras (the fin patrol as we call them!). Ok, so I have several questions so please bare with me. I want to make sure I'm doing everything right. Please bear in mind a few things I think you should know which may impact the way in doing things: I am struggling with nitrates as I have 40+ in my tap water, and I also have an explosion of diatoms which I'm struggling to keep under control. 1. I have upgraded the filter. I've bought a fluval u2. The reason for it is that my current filter is what came with the standard kit and I don't believe is the most effective or adequate for my fish. So the question is, do I let the new filter do the nitrogen cycle with its current media? Or do I replace some of my matrix from the new bio max which is in the cartridge to help kick start the cycle? Could the diatoms contaminate the new tank and affect the cycle? 2. Existing plants and decorations... I know I can clean the decorations but what shall I do with the plants? To be honest even though I've tried my best to wipe off the diatoms they are looking quite bad. Would they recover in the new tank? Would the diatoms spread over the new tank as well? Or shall I just get new plants? 3. I'm using stability and Prime so will be using those to start up the new tank. How will I know the tank is cycled. According to stability I can add fish as long as I keep dosing for a week as per their start up instructions but I'm keen to get it right so would rather wait if that's best. Also I always have nitrates so how will I know tank is cycled? Any tips from anyone with same nitrate issue? 4. Airstone or not? Is it advisable? I don't have one in the existing tank but I've been given an air pump with the new tank (2nd hand though) advisable or not? 5. Transferring fish. When and how? Can I transfer them all in one go or do I need to add 1-2 fish at the time? I'm conscious tetras need to be in schools so worried they will be distressed. 5. Algae eating stock- once I transfer my fish to the new tank and are settled I'd like to introduce some corys and/or nerite snails or shrimp to help to keep the diatoms at bay. Good idea? Bad? What are your thoughts? Thank you for your help!