Planted Tank Guru
Join Date: Nov 2009
Location: Missouri united states
As mentioned above, Osomocote pot shot's (do google).
No little yellow ball's everywhere unless,,you are one of those who is alway's uprooting plant's.
Shove em deep into substrate, and replace em about every four month's.
Had been using jobes plant spikes for fern's but sudden die off of cherry shrimp's which had been thriving before inserting the spike's,,left me searching for other option's.