Patty Winter wrote:

Last summer I bought a Monrovia shrimp plant (justicia brandegeana).

Repot into an adequately sized porous (unglazed) clay pot with new
high quality potting mix, a mix with no added fertilizer. Place in
good light in a warm draught free location. Water regularly,
sparingly, do not over water. Over watering and fertilizing are the
most common causes of house plant demise. Repot into a clean pot with
new potting mix every six months, never fertilize.