fluval 406 help
The dragon goby saga continues! I swear he has grown an inch already since coming home! He seems really happy in his 20 gallon fresh water tank, I love watching him shake himself in to the sand, he kind of reminds me of a finned puppy... His coloring is great, he has definitely gotten a really neat iridescent sheen. I am so glad he's doing so well, I was so worried about him thriving while we set up a good tank for him.
His new home (I went with 75 gallon when I realized that I didn't have anywhere to put a 90 gallon!) is working on it's fishless cycle (wow do I feel like I'm back in chemistry class, but it's been a great summer science lesson for my oldest) but I'm a little confused about the filter. It has a 406 fluval filter, but I'm not entirely sure what components I need for it.
I already ordered the nylon bags w/ carbon, what else should I get for the tank? It seems like there are a lot of options, should I get the bio filter and bio max rings? Our filter for the 20 gallon just consists of a carbon bag and little plastic scrubbers, so I'm a little confused by all the options.