no just fish poo and this ball was under 2.6 watts
but all my moss looks like this, watts range from under 1w to 2.6 and everywhere in between,
i have well water and high iron so i think it likes the iron,.. i dose nothing but prime and a little ph up in the winter for my well drops ph but only on the sensitive fish,..
i have one more moss ball for sale,. just a bit smaller
$7.00 out the door,..
looks just like the other only a bit smaller, between baseball and soft ball size.....