You need to test the antler in a separate bucket of water so nothing in the tank affects the pH reading.
Get 2 buckets and fill them with tap water. Check the pH on both buckets and write the results down. Put the antler in one bucket and leave it there for a week or two. The other bucket has nothing but water in and is the control. Monitor the pH on both buckets during that time. See if there's any difference at the end of a week and two weeks.
Get 2 buckets and fill them with tap water. Check the pH on both buckets and write the results down. Put the antler in one bucket and leave it there for a week or two. The other bucket has nothing but water in and is the control. Monitor the pH on both buckets during that time. See if there's any difference at the end of a week and two weeks.

Still, from a new starting point, it looks good even though most plants are just floating free without anchors.Ammonia has risen from ~0.25 to ~0.75 but that is probably due to dead fish before removal. I hope that I can re-do the tank while maintaining the clarity. Lordy, I hope what I've said does not seem cold in relation to the dead fish as I am very upset about all of this. It just seems to me that I have to get over it and go forward.