What kind of substrate wont dye my water?

[skiblits]

I'm continuing my 55 gallon paludarium for the salamanders and when I started looking up substrate for my plants I noticed that I lot of substrates use the co-co fiber mixed with some type of soil. Which at first i was fine with until I realized that if any co-co fiber drops into the water below I'm going to have and orange pond. Can I mix some type of soil with peat moss? Does anyone have any ideas for a good salamander substrate?
One more question, a lot of the soil mixtures that are salamander safe like the organic soil has manure in it, because the substrate will be damp do I have to worry about a manure smell?

[Mink]

you are always going to have problems with substrate getting into the water. the best you can do is ensure that the water is getting filtered enough and you are doing enough water changes. In my 55 at the moment i have pure coco fiber but am getting minimal discoloration.

[skiblits]

I know substrate will get into the water. I was hoping I could find a substrate that wouldn't color my water like co-co fiber does. I guess I just need to make sure I have a good filter on both ends.
Thanks for the help. ^_^

[alienator064]

How about pebbles? Those are easy and still look good. Gravel also works well. Pretty much any substrate that can be used in an aquarium will do fine.