This substrate additive looks good - anything looks good that will increase the growth of the bacteria that will mean less water changes! I read somewhere that my kind of filter isn't as good as the wheel when it comes to developing the colony of bacteria needed to make a healthy aquarium. But as a new, new, newbie I hesitate to buy more products since so many have been recommended from the LFS and are now sitting unused due to the better information on this website! (my husband jokingly has kept a tally of cost per fish - it's pretty high until I can get more fish) I'm going to go ahead and order it - the tank looks so clear and the fish are swimming, eating and looking healthy. Who would know that lethal
nitrite is lurking in that nice looking aquarium?
I have been slowly adding plants during this process and I think that has really helped our fish buddies. They stay in the planted part of the tank most of the time.