Well if you want us to pick your calcium reactor for you then My recommendation is to go with the Georeef line. Premium aquatics can assist you on the correct size for your system. So, what else do you want to know about calcium reactors. you will need a co2 bottle (I recommend 5 gal), set of gages, and some valving with a bubble counter. If you go with a unit that provides for a probe you can set it up with a controller. you will need the media for the reactor such as ARM, or Kent brand, or, other. If you decide to go with the Geo series then you need look no furhter. If you decide to go with the Knop reactor you need look no further. Both these units will perform very well with your system. So, how can I further help you. let me know. Schuran I understand is good quality but parts from this manufacturer are sometimes hard to come by according to some I have talked to while deciding which way I wanted to go. I put deltec in the category with KNOP. Hope this helps. let me know if you have any more questions I can help you with.
I went with Georeef as I feel it is simply the best affordable reactor available, has excellent support, and parts replacement when needed are readily available. Customer service at Premium aquatics where I purchased mine is extrodinary and they are very responsive. I spent 6 months looking at calcium reactors, did a lot of reading on various products and decided on Georeef. If you have any more questions let us know.
