Hi, I am new to the thread and still reading a few things. I have been a pool owner for 7 years and I am at my wits end with this pool. This algae won't die and the running joke is that it is the undead Algae. I have been told this is algae - it is spotty and seems to be in the crevasses of the pool floor - is a mustard algae. It is all over and not just in the shade or sunny part of the pool and never on the walls. If you sweep it, it turns to dust. My water is crystal clear and fully balanced. No one can figure out why this keeps returning.
Here is what we have tried.
1. Used Yellow Algae treat by broadcasting in pool, then brushing walls and floor, shocking it only to have it return. (Today new twist was dumping 2 gallons of liquid chlorine in skimmer). All the stuff that was in the pool that could have algae on it was put in to be killed.
2. Tested for Phosphates and it was high but we knocked that down and tested during a period when algae wasn't present. I was told you can't test phosphates with algae present but algae is always present so I just treated it several times. There were dead phosphates but recently I have not had any dead phosphates
3. They tested for iron, nothing with that.
4. They tested nitrates and that seemed high but with the algae they say that could mess up the reading. The only cure they say for nitrates is to empty the pool halfway and fill it up again. The pool was filled halfway with fresh water when it was opened.
5. They tried a copper algecide with no luck
6. I have vacuumed to waste, backwashed, rinsed and even had a priest come and bless the pool to rid the demons.
I am just totally aggravated. Today when we did step one and the algae came back the fastest I have ever seen - within 4 hours (see pic). It is spotty and there are some lines where the crevasses are. Chlorine levels are there but a little high. All other chemistry looks great. I have been running the filter 24 hours for the last 3 weeks and I have good pressure. The pool stores have no idea what to do next so I decided to try and research this myself and to post on a forum to see if anyone else has an idea.
Any guidance or ideas would be greatly appreciated.
Thanks
Ted
Here is what we have tried.
1. Used Yellow Algae treat by broadcasting in pool, then brushing walls and floor, shocking it only to have it return. (Today new twist was dumping 2 gallons of liquid chlorine in skimmer). All the stuff that was in the pool that could have algae on it was put in to be killed.
2. Tested for Phosphates and it was high but we knocked that down and tested during a period when algae wasn't present. I was told you can't test phosphates with algae present but algae is always present so I just treated it several times. There were dead phosphates but recently I have not had any dead phosphates
3. They tested for iron, nothing with that.
4. They tested nitrates and that seemed high but with the algae they say that could mess up the reading. The only cure they say for nitrates is to empty the pool halfway and fill it up again. The pool was filled halfway with fresh water when it was opened.
5. They tried a copper algecide with no luck
6. I have vacuumed to waste, backwashed, rinsed and even had a priest come and bless the pool to rid the demons.
I am just totally aggravated. Today when we did step one and the algae came back the fastest I have ever seen - within 4 hours (see pic). It is spotty and there are some lines where the crevasses are. Chlorine levels are there but a little high. All other chemistry looks great. I have been running the filter 24 hours for the last 3 weeks and I have good pressure. The pool stores have no idea what to do next so I decided to try and research this myself and to post on a forum to see if anyone else has an idea.
Any guidance or ideas would be greatly appreciated.
Thanks
Ted