Recently bought a bag of marine sand to use as substrate for my freshwater planted tank. I'm worried that it might not be suitable for the plants and fish inhabiting the tank. Can someone clear my doubts?
I can't tell what type it is as it does not state on the packaging...Is it silica sand or aragonite or crushed coral?
Silica is ok, aragonite will give you hard water by release Ca+ and is good for African cichlids and coral is for saltwater or brackish tanks as it does the same. This results in hard water and higher pH which isn't suitable for all freshwater fish and even many plants.
Also looking at the bag it says it was collected naturally which means it may have salt in it which is definitely not good for a freshwater tank.
Can I ask why you chose a marine sand over the others as the non marine has a lot more variety to marine at least where I live.