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we put the sand back in the filter about 6 days ago. I did look at the laterals, all looked fine. I think i need to see sand with the proper corn size so i can compare to what i have. im starting to think the problem might be the mp valve.

So much sand has come out that we have used a shovel to get it out. last week we opened up the filter and it was almost empty of sand. (so the filter emptied itself over about 3 months). It seems to have calmed down a bit, but sand is still coming out. But can too big grains cause sand to go to...

Ever since the pool was built 7 years ago we had some sand come out, but it wasnt a problem until recently. the last year it has gradually gotten worse. then 3 months ago we changed the sand. the company who built the pool sent us sand, it said sea sand, but it didnt say the size on the bags. We...

I dont know if my filter has an internal air bleed. where in the filter would that be? do i need to take all sand out to check it? If someone could tell me what problems too coarse sand could cause i would be grateful. Thanks, Charlize

I suspect the sand might be too coarse, but i dont know if that could cause sand to go to the pool? Another theory: the big valve connected to the sand filter (the valve i turn to backwash etc), could wear and tear on this valve cause sand to leak to the pool?

The laterals are ok, we checked.

hi, I have sand going out into the pool. Can I put an extra small filter along the pipe from the sand filter to the pool? BR, Charlize

yes, i thought it would drop a bit myself. i should say that it was the gardener that added the boric acid while i was away for a few days. when i got back, the ph was around 8. he said he hadnt added anything else. the swg could be the reason, i guess. but its a bit strange too, that it would...

report: i added 10kg of boric acid. tested after a few hours, borate level 30. ph went up a lot. added 1,5l of MA over a few days. now at 7,5. all is looking good. water feels nice, and is clean.

ok, great. Are there any precautions i need to make when handling boric acid, fumes, irritation etc?

hi, I want to add borates to our pool. Today i received a delivery from the chemical shop, and among other things i received boric acid. it is powder, contents says 100% boric acid, but under it says there is some boric oxide. Does this sound ok to use? I can take a pic of the label if it is...

yes, i will shock starting tomorrow. Does anybody have any idea about how long time i should shock? the water is crystal-clear. TC is 4 and ph is 7,7.

ok, thanks for the links. from the pics i am pretty sure that what we have is corixidae, water boatmen.

I saw about 5 small creatures in the pool yesterday. They look like insects but can swim, about the size of a fly. This morning i can see around 20. What is the best way to get rid of them? They are not easy to catch, so i doubt thats an option.

ph is around 7.8-8. FC is around 4. i just added 3 kg of calcium. water is crystal clear, not had any problems thus far. CYA is around 40. will get it up gradually by using trichlor. seems my FC is quite stable, i guess its because of the swg. i will order muriatic acid tomorrow. Should we...

ok, this means i will not use the ph minus because i have an swg. i will ask for hydrochloric acid. any advice on the calcium? i guess as nobody mentioned that part, its ok to add it and its not a dangerous substance. thanks for the advice, great info! EDIT: i just opened the calcium bag...

yesterday we went to the pool shop and bought "ph minus". it consists of "sodium bisulphate", what is this? i was expecting muriatic acid, but they didnt have this. we visited the chemistry shop and bought some chemicals, soda ash etc. we also found this: calcium chloride, it says 74% min...

great info. This will help us a lot in the coming weeks. :)

Hi, I am trying to find info about how to handle chemicals. I am probably not looking in the correct places. can someone provide a link? how to handle MA, chlorine etc. Does MA give off bad fumes? How can i protect myself when pouring it into the pool etc. Thanks in advance!

i am just trying to learn more. but i am sure i am in the risk group for getting the new pool disease, hehe. tx for the symptoms list :)

We just finished starting up our new pool and i have a few questions: is it possible to backwash too much? For example, is backwashing twice in one day too much? I know i should look at the pressure on the sandfilter, but sometimes i am leaving in the afternoon when the pump starts and i want...

everything has been running nicely now for 10 days. I have received training about how to use the system. This marks the end of this thread, i will make posts in the other subforums when i have questions now. thanks to all who contributed in this thread!

The pool guy has fixed it. He only speaks thai, so i dont know what happened. The PB is coming next week, so i will know more then.

When we started the pump today, the system started blowing sand into the pool. i stopped the pump immediately. I have talked with the PB, and he is coming in a few days to fix it. He said the likely problem is that the sandfilter is broken. I dont know the details of this problem now of course...

ok, i fixed it. There was a small plastic "rod" that had come loose, this rod works as hatches and fits in 2 small holes, one on either side of the skimmers inner wall. We just solved our first problem, thanks so much guys!

yes, there are 2 skimmers. The other one is ok. yes, i think something made the flapper break off, more precicely the gardener when he fit or removed the tube for vacuuming. i will try to see what i can put in the skimmer to protect the system.

Found the flapper of one of the skimmers in the water this morning. Its broken off the hatches. in the skimmer there is no longer any hatches to fit the flapper back on to. Our gardener used this skimmer last nite to vaccum. maybe something happened when he did this. i cant think of any other...

yes, the pressure is variable :)

We had a 5 min dip :) when we were in we tried to feel the water from the inlets. The flow is very up and down. is this normal? [attachment=0:1i4hq6eo]DSCN0723.JPG[/attachment:1i4hq6eo]