jadavis98

Hmmm, they kinda look like diatoms to me, but not sure. Diatoms are not technically "algae" .

I use the Osmicote Plus tabs and they seem to work well in my 29 gallon. No ammonia issues so far. They can be annoying as heck to bury though. I have had several popup and just disintegrate and leave the little pellets dropping all over. I only got them because as you pointed out they are cheap. I believe I have seen better plant growth since I started using them about 4 months ago, but I also use some liquid ferts, so cannot prove it.