Hello, HF.
Thank you for contacting Holy Hydrogen!
There is no problem using Mountain valley spring water.

We apologize for the long wait on call back request. We are receiving sudden increase in inquiries and we are short staff. We make sure that our customer service representatives are well educated on H2 and health to better serve our customers, and educating staff takes a long time… We are trying our best to get back to all customers in the orders they received, so please give us a little more time to get to you. You may also reach us via email at info@holyhydrogen.com. Again, we are very sorry fir the long wait and thank you for your patient and understanding.