Must follow the good advise given.
- The argument that the algal bloom returns with either monthly or weekly water changes is a non-argument, simply showing that nutrients are extremely high. Sometime ago, I had a similar issue with a newly set-up tank. I would change 50% water and by the next day it was as if none had been changed. It took nearly complete water changes several days in a row to solve the problem, because if the nutrients are high, even a small inoculum of algae (left in the tank after a partial water change) is sufficient to cause a repopulation in just a few hours.
The algae can grow that fast. You will need large daily water changes for several consecutive days (and improve other aspects) from the algal bloom to subside.
- You have a tough combination of 1) way more biomass (fish) than advisable; 2) badly insufficient water changes; 3) too small an aquarium for those fish; 4) possibly overfeeding; 5) apparent reluctance to recognize that such blooms ALWAYS are due to conditions favoring explosive algal growth. Also, the fact that you indicated similar problems when the tank was at another location suggests that your maintenance procedures are what needs modification.
It is possible to turn things around. Good luck!
PS- a 75gallon for the 2 large oscars would still be smallish, particularly with insufficient water changes.
- The argument that the algal bloom returns with either monthly or weekly water changes is a non-argument, simply showing that nutrients are extremely high. Sometime ago, I had a similar issue with a newly set-up tank. I would change 50% water and by the next day it was as if none had been changed. It took nearly complete water changes several days in a row to solve the problem, because if the nutrients are high, even a small inoculum of algae (left in the tank after a partial water change) is sufficient to cause a repopulation in just a few hours.
The algae can grow that fast. You will need large daily water changes for several consecutive days (and improve other aspects) from the algal bloom to subside.
- You have a tough combination of 1) way more biomass (fish) than advisable; 2) badly insufficient water changes; 3) too small an aquarium for those fish; 4) possibly overfeeding; 5) apparent reluctance to recognize that such blooms ALWAYS are due to conditions favoring explosive algal growth. Also, the fact that you indicated similar problems when the tank was at another location suggests that your maintenance procedures are what needs modification.
It is possible to turn things around. Good luck!
PS- a 75gallon for the 2 large oscars would still be smallish, particularly with insufficient water changes.
