well ive got a nano going to a 20g and let me just say
1. get a light that is 20" why so that you can actually have it held up on the tank. if its a FOWLR then not really much light is needed but garenteed your a going to put softies in at least. so get a fixture with at least 2 lightbulbs in it, one for actinic and one for 10k
2. yes skimmerless is fine, in fact i think better, why because you replace all your needed nutrients with the water change. ONCE A WEEK, must stay on top of that.
3. get a HOB that is way over rated for it like a 70 or even 100 Aquaclear, lots of room for a conversion into a fuge, the 70 you can get a slower impeller for it the 100 you have to cut some off.
4. get sand dont get CC.
5. make sure you have enough rock for it a ratio of 1.5 at least. i have 35 pounds in my 20. i would add more if i had space. i cant think of anything else. dont go cheap with the light you will want to upgrade it after even if you have a reef already.
oh yeah and dont run an undergravel filter if you do, im not sure if you do, and get the kor nano. definatly the best. and cheap online too.
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