need advice
hey sea gnome, Dolomite will turn into live sand but some people don't like how fine it is. I am going to do a mixtureof sugar sand and dolomite in my tank when I set it up.
in my opinion a sump/refuge is worth it and drilling your tank is about the best way to go (remember no one will guarentte that your tank won't crack when they drill it so find a place that has done lots of tanks.
your magnum 350 is 350 gal/ hour at 0 feet of head if you are putting your sump under your tank then you will probably be luckey to get 100 gph out of it whare for a 90gal tank you should shoot for about 900 gph. if you are going to put the refuge above the tank and you want a gentle flow into it you could use the 350 to pump upto it and then have a overflow going back to your main tank. this way you drill the sump and you don't have to drill your 90 gal tank. I am not sure what the ideal flow throught a refuge is but it is a slower flow. maby some one else will chime in here also.
Steve
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