I was thinking about getting 1 of these for my 90g. Here is the link, it comes prefilled. Has anybody had any bad experiences with this product? As far as I understand, this is a plug and play system, correct?
You need some means of getting the CO2 into your tank, but the choice is up to you. I think most people would suggest a reactor on a tank that large - there are some fairly simple DIY options if you search.
Ok, so I am assuming this 'reactor' is just a means of getting the co2 to dissolve into the aquarium? I dont think I want to spend 50$ on a reactor, nor deal with diy, whats wrong with something like this