two days ago I noticed very small worms about 2mm on the glass of my aquarium. So I scraped them off the glass vacumed the gravel and did a 50% water change. The next day there were a lot less, then one of the filters died. So, I bought a new one, started it up, and have done nothing else to the tank, and now all the worms are gone. Water is 7.4 pH ammonia 0 Nitrite 0 Nitrate almost 0, temp is 78f and it's a 33 gallon tall with the following 7 tiger barbs a dwarf gourami, three otos and a male pinapple swordtail. It concerns me that they just disappeared. None of the fish are sick. Should I be worried?
