I first started cycling my tank with BioSpira and it worked quite well. The cost was about 16.99 to treat 90 gallons (used the whole thing and a very little amount on some smaller tanks.) I had only a few small fish in my 29g but the nitrites were still a little high. After adding 5 more fish, 2 of which are quite large for my tank (huge waste producers), the nitrites read WAY high. I knew something had to be done so I went to the LFS and they were out of BioSpira...
Well, it wasn't such a bad thing because they had a other product called "Fritz Zyme Turbo Start." Perhaps many have heard of it, not really a new product from what I hear.
Anyway, this stuff is AMAZING! In my opinion it worked WAY better than BioSpira. On Tuesday I had nitrite readings of about 3-4 ppm. Today is Thursday and it now reads 0.25.
I can't quite remember but I think it was about $23-24 to treat 150 gallons worth. I've only got a 29g and have probably used a little less than half of it by now.
Cons of BioSpira
- Cost more for less
- Not as concentrated
- Some ammonia remover products kill the patented bacteria
- Comes in a no so convenient foil bag
Cons of Fritz Zyme Turbo Start
- None that I know of anyway!