slam

My question is, is a CYA of 90 too high to perform an effective SLAM for mustard algae? According to the tables in TFP, the FC for SLAM is 35 and it is 51 for the Mustard Algae SLAM. Is it even possible to obtain a FC level that high without bringing in truck loads of liquid chlorine...

Hi all. Hoping for some clarity (of my water too!) I recently completed a SLAM with no OCLT and crystal clear water. After only a week or so, FC was staying above 7 and then started to go cloudy again. Also noticed white crusty flakes in the pool. Quite a lot. I had a look on the SWG plates and...

In conducting my SLAM, it passed the Overnight FC Loss test, the water is clear, but the CC is 3.0. What to do?

I am writing this as a record of my steps in dealing with a situation I'm sure many of my neighbors in Texas are dealing with. In central Texas, the pecan trees are occasionally infested with aphids in late summer. The aphids will suck sap from the underside of the leaves. The sap is under so...

Hello! This is my first post here ever! So.... My out-of-ground 15,000 gallon pool has been greenish and cloudy for two weeks. TWO /HOT/ WEEKS! I used a bunch of pool store :poop: on the pool to no avail. So, I found this place (thankfully). Here's where I am right now: I flocked the pool...

Had recently finished successfully SLAMing my pool. Being that our summer days are limited, want to be able to let the kids back in the pool sooner versus later. After a couple days of days, the pool’s FC is still in the high teens. My question is- When you are done SLAMing and per instructions...

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...

Hi, everyone. I’m dealing with a small outbreak of algae. This is my first experience with it, so I have a couple of questions. We accidentally left the chlorine generator off on our SWG and, with weather too cool to swim, I didn’t pay much attention to the pool. That was a mistake...

Hello! This is our 3rd summer with a 30k gallon vinyl (?) in-ground pool of unknown age in the middle of KS surrounded by cottonwood trees. We had switched it to a SWG our first summer and replaced the sand in the sand filter with ruby sand two summers ago. Other than a few small hiccups, we’d...

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...

We are new to pools as ours was finished about a month ago. We are leaving for 6 days so I am wondering what to do. Note that our SWG is not turned on yet so it’s a regular chlorine pool for now. I know I should SLAM before I leave but what else? PH is at 7.8 but rises quick since pool is new...

So at about my breaking point with this pool so I decided to post for some help from the experts. Pool was closed by local pool store and for the first time - when I opened this year it was the greenest I've ever seen. (1st photo) I'm wondering what caused this in the first place as I had...

I replaced 1/2 of the water in the pool (lowered CYA to 50) and I want to SLAM it. I balanced the ph & alk 1 hr ago (soda ash) , wondering how long do I have to wait before adding the liquid chlorine to slam FC level?

Howdy TFP, I've been trying to get my pool to Shock level for the past 36 hours with little success. The pool math app keeps advising to add 2 gallons of 10% chlorine every time I test but I can't seem to get above ~2 FC. I'll even test 15 minutes after adding to see if I get a quick spike but...

Quick background: After purchasing a new home that came with a pool, I knew my knowledge was at a solid zero and that I'd need some major help. We turned to the company that the home's previous owners used to open/close the pool which informed us they no longer serviced our area. So I did some...

Hello all! I have had this pool for 10 years now. This is the first time I have opened the pool w/ the new pump and cartridge filter. I am running the pump at a constant 3150 RPM. The flow rate says ~80 GPM Depending on how many leaves have fallen into the pool/skimmer basket. The PSI on the...

Over the past few months, I have become the "chemical czar" over 800,000 gallons spread out over four pools in three locations. This has been a 100% learning by doing, TFP and YouTube exercise. In the land of the blind, the one-eyed man is King. One of my outdoor pools is a 126,000-gallon...

Stay true to the Slam Process, it works. One thing I will say though, make sure your equipment is working effectively. For the last 2 seasons I had my pool chemistry on point but the pool didn’t look like I wanted it too. I finally cut the piping this year to open up the sand filter and there...

Hi Everyone - I have some questions about pool opening and pool covers. I have an old loop-loc cover that probably is in need of replacement. Each spring, I spend about a week sanitizing the water in my 43k gallon pool. When I remove the cover, the water is black – it’s disgusting. It entails a...

Hey everyone! Opened the pool today to no algae and just some cloudiness (yay). Most recent test results and log attached. Based on these results is it ok to start slamming? I’m mostly concerned since the pH is slightly lower than the recommended levels here on TFP to do so. Thanks for reading...

I needed to SLAM my pool while opening--it had a green tinge and 0 FC. I used roughly the same amounts of chlorine to do it as I did the last time I SLAM-ed, forgetting that I added CYA since then and need way more chlorine than what I remembered to reach SLAM levels. I've already passed an...

I am two weeks into a SLAM to get my 26K gallon AG pool operational. I have seemingly tried everything under the sun to get my pool clear - it is currently a cloudy light blue and has not improved much over the last week (maybe 5% better in one week). If I look closely I can barely see my pool...

Hi All, I'm preparing to do my first SLAM starting Thursday night. I'm keeping my water balanced as best as I can until then. I'm waiting until then so I can give it the attention that is needed. Also, it is supposed to rain today and tomorrow, so I'm hoping that will drop my CYA to an...

Just bought a house that the owners didn't take care of the pool very well. It's 35k gallons with sand filter and SWG (not using yet due to swamp). CYA was below min reading of test, so been working on adding enough CYA to get to 40ppm and using a FC target of 20ppm. SLAMed for 2 days, using 24...

I've SLAMmed it several times, and the best I can do is 0.8. If I don't SLAM on the reg, it will be between 1 and 2. I figure I must be doing something wrong for my setup. Here are the factors that I think are influencing my process: My < 1 year old tub came with an ozonator It's under a tree...

Hey all, First, thank you for this forum. I've learned a lot! I think I'm also very confused. After having some company for the weekend, I noticed that my FC went to 0. I decided to do a SLAM to bring it back to health. Post SLAM, FC levels (once I started measuring again) went from 12 to 5 in...

Hi all, just had my pool totally redone (plumbing, pebbletec, filter and pump), and I got lazy with my chlorine and now it's green. Since some of my test results are weird, I wanted to check before I SLAMmed. My CYA is very low, so would like some advice before I start. 15,000 gal pool -...

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...

First year pool owner. I’ve been following the pool stores directions on how to care for my pool. The pool store is also the same company that put the pool in for full disclosure. My pool is now completely green. They keep selling me I’ll decide to pour into it and telling me to turn my...

So, back in July I went through a algae problem which I was able to successfully overcome through SLAM. However, since then, I feel like it comes back so easily even though I have been making sure to keep the chlorine over the recommended levels for my CYA and I feel like I am constantly running...