By default GrowFlow only shows you in stock inventory that has quantity above zero.
We do this to make things load faster and so it's easier for you to organize things.
If you accidentally zero'd out inventory, here are the steps to get it back.
If you know the id, you can search for it on the inventory page, and then click "Search All Inventory" This will search that specific id and bring it back from the server.
Once it's brought back you can adjust it.
If you can't remember the id, you can view the "adjustments" reports to view recently adjusted inventory and then find the id there and do the same steps as above.