holow t decoration.stench.
i have a 29 gallon tank that is 1 year old now about three months ago i put in it a hollow tree trunk decoration.
well i have always had a minimal nitrite level despite every other weekly cleaning and monthly filter maintaince bi weekly feeding etc. and when I lifted the tank hood i got a gaseous smell obviously from bad bacteria
i put two and two together and have realised that the tree trunk has no water flow inside it so the water inside effectively went stagnant allowing a perfect warm cosy hole for bacteria.
what i want to ask to confirm is will putting an air stone inside the trunk stop this gaseous smell and bad bacteria build up or is the hollow decor best left out altogether?