The peat granules just peat moss in granular form.
HI that isn't going to lower the Ph much if at all. That is peat moss, rather than peat. If you get some peat granuals (fluval, eheim, and all the big brands make them) https://www.aquaristikshop.com/aqua...ge7ZvGmjwZm4xE58oHgwdd9Mnc8cYyzxoC8x8QAvD_BwE. That should help. Although, you may want to consider whether you need to lower Ph, most fish can adapt. I add some peat granuals (in a filter bag) to my filter because I have hard water, but have fish that prefer soft water. It just makes them a bit more comfortable, but it doesn't dramatically lower ph.I have sphagnum moss but it isn't working should I dry it out