09-15-2007, 08:22 AM
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LFS, local fish store. (hidden reefs as you put it)
75-90g could never be "to big for just 5 fish". Whenever we put a single fish in a tank we create an unnatural environment for them. Think of it this way, fish don't live in 75g ponds in the wild, they live in thousands of gallons minimum. I only have 4 fish in my 75g salt water tank.
If you are up for the challenge, Walmart has a good price on a 55g if you'd like to try it. I think your current fish load would be happier there. I still wouldn't run out and buy anymore fish. The cleaner the water, the happier the fish. More water takes longer to pollute.
Should you try salt on a $250 budget? Sure, but do a lot of reading first. Why not buy the larger tank for your FW fish and then do a mini salt tank with the old 10g? A small bag of aragonite sand, a nice little hanging filter, couple of pieces of "live rock", a couple of gobies and a shrimp would do alright for about $100 or less. Just know that you'll need to do a 3-5g water change weekly. Don't worry about adding corals as they won't make it in a simple tank like that. You might try some zoa or mushroom corals but that's about it.