mustard algae

  1. P

    Not sure what to do!! Pool has been green for a week

    FC: 12 CC: 0 CYA: 45 PH: 7.8 TA: 100 Hardness: 125 Above ground pool, ~6900 gallons 14 inch Intex Sand Filter I used a TF-100 test kit My pool is green and has some sandy-like yellow debris at the bottom (I believe to be mustard algae). I have read the SLAM process and have been maintaining a...
  2. E

    Calcium Hypochlorite or Algae

    We just installed this pool this summer, previously we had a 10k gallon round pool. It had been open just a couple of weeks when problems started. 5 weeks ago it rained for a couple of days and the weather was very warm, the top of the water was beginning to feel slimy but not terrible so I...
  3. D

    Mustard Algae Slam Difficulty

    Hello TFP members! This is my third summer of pool ownership and our first SLAM procedure. Carelessly let the FC drop lower than needed for a few days and shortly after started noticing what seems to be mustard algae blooms. Performed a "half-way" SLAM with lower FC levels thinking I could get...
  4. T

    Yellow Algae?

    Brand new to group! I’ve been fighting this for about three years. I don’t know if it’s yellow algae or something else. It’s not ‘yellow’, more sand color, but it’s powder like if disturbed. I’ll shock, vac to waste, replace water loss only to have it return. It’s isn’t selective where it...
  5. PowerPigg!!

    Thought it was mustard, now not so sure

    I began SLAM process 5 days ago to address what appears to be mustard algae, but now I wonder if I have misidentified what I have, and have the additional complication of having slacked in frequency of chlorine upkeep due to emergency work time demands since Wednesday. My logs are shared so all...
  6. Jebil

    Algae? Iron? Treated both with no fix.

    Been fighting this brownish stain/residue and cannot beat it. Pool was completely clean when I uncovered it in march. Took sample to pool store balanced water. Everything was going good then BOOM this brownish stuff set in. I told pool store and they sent me home with jacks magic the blue stuff...
  7. E

    Mustard Algae Troubles

    Hello. I'm new to the site and to the TFP method and I'm hoping someone can let me know if I'm on the right track to treating what I think is mustard algae. I recently fired my pool maintenance company for a number of reasons, including the persistent algae on the southern, shady walls of our...
  8. S

    Huge Pasture Behind Pool- Farm Dust, Pollen or Mustard Algae?

    Hey there y'all! New to having a pool this year and have been dealing with brownish yellow dust for the past month or so. I have used Yellow Out and done the full cycle and Green to Clean and done the full cycle and am still dealing with the same issue. There is a fine yellow brown dust coating...
  9. C

    Cleaning cover before closing

    When I opened my pool at the beginning of the season, I had an algae problem which might have been mustard algae? I wasn't sure and just treated it that way with directions from this site. The water cleared up and the pool has been running clear all summer (Thanks TFP!). Now that I'm getting...
  10. S

    Mustard Algae questions

    I just purchased enough chlorine to complete the mustard algae slam procedure, but I have some questions before I do it. I slammed about 6 weeks ago after the pump died and algae bloomed for several days, but I did not do the mustard procedure which I am now 100% sure I have (mustard yellow...
  11. A

    Mustard Algae

    I’ve been SLAM’ing for close to a week - my second time doing so because I think I jumped the gun a day or two early last time I believe. I have passed the OCLT three mornings in a row. CC is virtually zero. But there is still a small amount of mustard algae every 12 hours or so, when I vacuum...
  12. C

    HELP, I don’t know if I have mustard algae or sand in my pool and I’ve tried EVERYTHING to kill it if it’s Mustard algae.

    I’ve had “mustard algae” for a year and a half and have literally tried everything in the books to kill it and most things twice. We even changed the sand in our filter to zeolite and the laterals looked fine to us plus the seals and all. I get splotches of sand colored stuff in the bottom of my...
  13. S

    Chronic mustard algae problem

    We have been battling a problem with mustard algae in our pool since last summer. We closed the pool at the end of last summer and hoped that when we opened it this summer we would have a fresh start but that has not been the case. I bought the recommended testing kit and did the test today. We...
  14. Webster

    SLAM day 4, is that algae still?

    I need help. I found this website through a Facebook group where I posted about having mustard algae I couldn't get rid of. Or at least that's what I think it is. Everyone I've talked to says it's mustard algae. I'm a new pool owner. We bought the house in March and opened the pool in April...
  15. H

    Mustard algae treatment with higher CYA (75)

    Hello all. So my pool developed mustard algae, I think after the chlorine level decreased when I left town and with the heat and water evaporation, the water level went below the skimmer and warped some of the pipes, making the pump lose prime and stop working. The mustard algae, which I had...
  16. M

    Possible mustard algae will not go away

    We are shocking using the slam method for mustard algae and we are not making progress after about 32 hours. Chlorine just dropped in the few hours we were at a baseball game after holding for most the day. I’m even using a bit higher amount of chlorine to try to beat it. Our alkalinity will...
  17. N

    Is this yellow algae?

    Hi guys, We bought this house last year and the pool has always had this stuff at the bottom. Sometimes it seems like it comes from the filter because we will vacuum it up and then the next day after running the filter overnight it will be back.
  18. S

    UPDATED: With NEW K-2006 Numbers: Where to start with SLAM??

    Hello all! New the forum here. Purchased a house last year that came with a 24,000 gal above ground pool with a Perma Salt system. I read before opening this year that those are frowned upon, so when we opened the pool, we decided to switch to a straight chlorine! I don't think we have added...
  19. Nate4429

    Mustard Algae during SWG Conversion

    Hey everyone. Feeling a bit overwhelmed. I just had a CircuPool RJ60 installed (converting to a SWG) and at the same time the pool guy said I have mustard algae growing. I thought it might have just been pollen but I really knew it wasn't :/ but my water is only 45 degrees so how can it be...
  20. R

    Green pool!!!!!

    let me start by saying I have 34 years in the industry and I have one pool that no one can figure out. This pool was opened this year in May. It has stayed green since. The 4th of July was the only day it was clear and blue. 2 days later....green again. The pool is super cloudy, can't see the...
  21. B

    Help Is this mustard algae?

    I noticed some of this on the floor of my above ground pool i thought it was dirt but when i wiped it up it had a slimy texture, it was more green in color so i assumed it was regular algae i scrubbed, shocked and did use algaecide (on Monday) yesterday the pool looked good aside from a thin...
  22. E

    Mustard Alge? Not sure if we killed it....

    Hi! I am a new pool owner and we had a professional open the pool and start us off. We were maitaining the chemicals in the pool and at first assumed the brown lines in the pool were sand(not sure from where) and let the robot vacum get them. After a week or two I realized it must be something...
  23. S

    Mustard Algae or Metals

    Hi everyone, I am new to TFP and have recently started trying to maintain my own pool and have been struggling with something that is either heavy metals or mustard algae I presume? We have been dealing with multiple pool maintenance companies with some success but have always found debris in...
  24. L

    How do I get rid of these light brown spots in my pool?

    New pool owner here and question about what I think is mustard algae. so long story short, when we opened our pool this spring, due to the large of amount of rain and leaves on top of the pool cover whenever we took off the cover the entire pool was a dirty brown cloudy mess. After turning on...
  25. S

    Yellow algae or sand/

    Hello all, new to TFP. haven’t done an OCLT yet (looking to get fas dpd test kit) could anyone confirm (by looks) is this is algae ? I think I’m in denial. There is a backstory including my SWG being out of whack for couple months and pool turning slightly green, I did the stainless steel...
  26. N

    Mustard algae shock in vinyl pool - advice and bleaching risk

    Hi all. I have noticed what appears to be mustard algae clinging to the shaded wall (I let the chlorine level run low so it's my fault). It was yellow in colour and easily removed by brushing. The water is still clear. I'm following the SLAM procedure using liquid chlorine. 1. Is there any risk...
  27. J

    What is this?

    I have a 24 foot above ground pool. Two weeks ago we started seeing what appeared to be patches of sand on the floor . If you try to touch it or vacumn it up it turns to dust and creates no cloudiness at all, the pool is otherwise completely clear. For 4 nights we cleaned the floor and...
  28. G

    Unusual Algae - Please help

    Hey! I have some Brown Algae in my pool that doesn’t brush off easily with a nylon brush. It has a slimy consistency and proliferates upon low chlorine and reduces when I shock the pool. The guys at two different stores said they’d never seen something like it. They recommended treating like...
  29. T

    The undead Algae

    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...
  30. Joel B

    Brand new pool, needs a SLAM

    Short story. The pool has been done for three weeks. The guy responsible for set up and maintenance disappeared and the pool builder is not very helpful. “We build pools, we are not chemists” We have yellow algae already, so I am ready to slam. I have read through the pool school book but have...