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In some thread around here not long ago someone mentioned something about adolescent cats having spots on their legs. I can't for the life of me find that thread or posting. Googling didn't turn up anything useful either. Did I dream this, or do young cats really have spots on their legs?
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Dec 5, 2007 05:15
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drat Bananas posted:I have a question about rocks or minerals you can put in fish tanks, particularly a 2 gallon beta tank, no filter. What won't disintegrate or poison my fish? I have a bunch of pyrite granules which I think would make kickass gravel, but, I don't want to kill poor fishy. Wikipedia tells me it's insoluble in water, yet says when mined it's exposed to oxygen and water which forms sulfuric acid so I'm confused. I didn't do so hot in chemistry. Yeah, you already found out that pyrite or markasite (both are FeS2) will leach iron and sulfur into the water (as iron hydroxide and sulfuric acid). Low concentrations, but high enough to bother fish. What you want is the kind of gravel that you'd find in an actual river or stream. Quartz is good, granite is OK, some basalts will be OK, most metamorphic rocks will be OK. The further downstream you go, the more stable the pebbles will be, so look towards the mouth of a river rather than at its source. Also, most of what you'd find being sold as gravel at a hardware store should be OK. I'd wash and disinfect it though. I used to boil my gravel for 10-15 minutes back when I kept fish. Of course you could go artificial and use marbles in any color you like. Research labs use marbles in cases where they need gravel.
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Apr 3, 2008 16:16
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