I found some colorquartz "t grade" and am looking for opinions from any that have used this stuff in the past. I want a black substrate for one of my tanks but I have had some bad luck with black gravel and the paint coming off and killing some fish in the past.
I seem to remember some people here that have used colorquartz in their tanks in the past. I am wondering is it a good substrate? does it lose its color like normal gravel does?
I don't have personal experience with colorquartz, but I did just set up a tank using Black Diamond blasting sand 20/40. It's soft feeling, it looks gorgeous, it wasn't dusty at all, and it was 8.99 for 50 lbs.
The color quartz substrates are inert materials and the colors do seem quite lasting.
The Fourite substrates from Seachem are intended for planted tanks, as they have high CEC (cation exchange capacity) so can hold mineral ions for easy use by plant root hairs. They are from of the laterite soils formed in tropical rainforests laid down eons ago as geologically old deposits, now mined and hardened but with essentially the same functionality as those laterite soils. Their cost is justified only for long-term planted tanks for me.
There are large differences between inert and high CEC substrates for tank use. Inert substrates can be used for planted tanks or unplanted tanks. High CEC substrates are only justified for planted tanks.
I would not use the Seachem substrates in any giant puffer tank. Those are not ever intended as lushly landscaped/aquascaped planted tanks. Mine have had only a few subnerse Crinums for shading. The Crinums do not need special care or supplements in those setups for me. You just have to remove some offsets periodically to preserve swimming space.