Alrighty then...

dont think i have any vinegar handy. the arangement was like so...

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the texture sounds like sandstone.. but im no expert
if it really is limestone then it probley wouldn't make your tank water cloudy or kill you fish that fast, even if the fish were really sensitive.
also arn't strip tests inacurate? ive seen that in many parts of this site... usually I hear the suggestion to not buy strips and to go with something else...
maybe someone who knows more of what they are doing can shed some light...
 
yeah, ive heard that too, but it was the best i could do for now. i had mentioned thinking about testing the water to my wife and like the sweetheart she is, she stopped by the LFS the next day and got them for me w/o my knowledge, lol. so i figured id give them a try.

anyone have any alternative suggestions for water testing?
 
I tend to think you inadvertently killed the bacteria in the gravel under the stones. This would create a sudden anaerobic condition under the rock. I would at least make sure you clean that gravel very well. I don't actually think it was the rocks themselves but it is hard to tell. They look more like sandstone and maybe some kind of quartz to me. Usually if I put large rocks in an aquarium I try and put them on the glass, or on a piece of Styrofoam to protect the glass and build the substrate around them.

I don't know what that would do to the water chemistry. I am not even sure I am explaining it right. But I do know you can ruin an aquarium in this way and create some pretty noxious gasses.
 
I posted on your last thread about how I also just set up a 125. It's been 3 weeks and my water is still cloudy. The tank is perfectly clear from the front, but from the side you can barely see the other side because of the white cloud. At first I was changing about 20% of the water and cleaning my filter every few days. Then I realized it was a bacteria bloom from the move and have since left it alone to let the bacteria settle into the filter, substrate, etc. I just go about my weekly water change and let it be. In the last week it has gotten about 50% better. As far as the rock, I would say based on your KH test of the tank and tap water that the rock does contain Calcium Carbonate as Dave said. It is recommended to have a KH in the 120-150 range for most tropical fish. I would remove the rock and try to use inert objects in the tank for decor so that your tank water will mimic your tap water in chemistry. Also, have you thought about overstocking? I know you've probably heard it before. But a single clown loach in with all of those fish....maybe he is stressed.
 
he's never seemed stressed before, ive had him for several months and there is one other clown in the tank. there was another the same size as him, but it died for some unknown reason. my big clown loach (not really that big, just biggER, about 3") does not seem stressed, and everybody has their own hiding spot. so yeah, i agree it might be pretty full, but there is plenty of structure.

after having the two large rocks out overnight the water is quite a bit clearer now.
 
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