Ok here is the deal lol. I have a client whose 90 gallon aquarium has been experiencing a problem with HA. It was a takeover account some years ago. Since then I've replaced the substrate won't get into that. The filtration is in the basement which I've upgraded along with the skimmer. Over the years the aquarium has done very well. So well in fact with exact words, "since it is doing so well I will have you come once a month, rather than twice". Now he does not want to put any money back into this set up even though I said otherwise last year. I added a new clean up crew, hermits snails etc even a sea hair which does great just not enough. Water parameters cal mag alk etc are all in ideal range. Phosphate and nitrate are both non detectable but this hair algae continues to persist. He thinks there is an answer in a bottle. I run carbon and ferric oxide both replaced once a month. He looks at me as I'm on drugs when I mentioned carbon dosing "vodka!?" So to keep this client I know money is going to come from my pocket to help rectify this problem. Oh and yes he over feeds stating he doesn't when I'm sucking up the lovely pellets he feeds along with frozen food. So.. I was going to add on a rdsb for starters hoping the additional bacteria may help. Kent magnesium will be the new mag supplement as well as lowering the photo period. I have a filter sock on the system which def will be changed more after he complains about the proposition as all the collected organics are of course causing a nutrient sink.Yes the bulbs are all just a few months old if anyone asks. Won't even allow a top off as he does it manually. So any suggestions? I am at wits end as I mentioned last year the other things that need to be done and he won't put the money into it and is questioning everything I say after 4-5 yrs of service and fixing previous problems from 3-4 other maint. companies.