Been having an all-out war with this 40 gallon for a while, had a massive hair algae bloom, and finally have it almost completely gone but the tank has an off-stink smell that doesn't seem to go away. Any remedy for this? Upped water change to 10-15 gallons every 3-4, swapping filter socks every 2 days since they turn brown and smell rank, and have Grape Caulerpa running 24/7 in fuge but even that has a rank smell. Pulled half of that out today with a water change, dt also has either a brown algae bloom still trying to grow or diatoms now on the sand. Bit late so ill post the parameters of tank tomorrow as well for further advice if nitrate/phosphate are high.