okay so I went EVERYWHERE home deopt, petsmart, lowes, walmart and my local gardening center... no one had any PFS or Diamond blasting sand... so I went to my LFS and he had Reptile Calcium sand... now I was wondering if I would be able to put it on as a cap for a dirted tank? It is pure white sand, 10lbs... I know it will raise the PH and I have IAL to counter that as well as Driftwood... but is it safe? This will be a cap for the Betta Imbellis tank I am doing... If it isn't safe I will switch up my plans and do a pebble substrate for the Betta's and use the calcium sand for the Ghost Shrimp tank I am doing today as well.. Thanks for the advice/help!!