rio 125

Hello I'm looking for some advice. I have recently purchased a Rio 125 with fitted filter. Since then I have brought some rocks, ornaments, a background and gravel. Now before my next steps I have a few questions: 1) Do I need an air supply? 2) Do I need to test my water? 3) How long do I have...

Hey All, I am currently buying bits to convert a Juwel Rio 125 into a marine tank with 25l sump underneath, not got to much done yet but as ive found the guides posted by others a massive help i thought i would do the same. Heres my current setup, freshwater with 21 fish currently... All i...