Bio balls, good or bad?

catfishmike

Superstar Fish
Oct 22, 2002
2,614
0
36
Sin City, again...
#2
did ya catch the sq.footage in terms of surface space?not that great compared to ceramic and other earthen based materials.at the price they are offering,and the size of each bioball,eheim substrat is a far better buy for about ten dollars more.bioballs still work fine but modern technology has really put there usefullness on the shelf,not in your filter.