SF POOL BOY

I have used Acid Magic in our 400,000 gallon commercial pools for two years. We have two high temp boilers that scale up on the inside of the exchanger tubes (previous post) I have also noticed some scale formation coming from small hairline cracks in the concrete of the pools. I have heard some comments from other pool specialist that the acid magic "might" be the culprit for this scale formation. Has anyone heard of this happining in other pools where this product is used or any other ill effects of this product? I really like this product from the safty standpoint with almost no fumes and much safer to handle, doesn't even eat the door knobs off of the storage room. Thanks

These are for a large commercial pool. Where the floor meets the wall it is a slightly rounded transition.

Pool specs are as follows: 2 30 HP pumps throttled to achieve a flow rate of 2250 through the sand filters (6) 1850. We do have a couple of pool vacs which we have always vacumed this to waste which eliminated some of the debri. A lot was drawn into the system though on the surface and what was already in the piping surge pit ect. We did manage to clean most of this up through out the year last season. Then changed the filter media as a last step. At start up this year we flushed out most of the piping before filling also. Kinda sounds to me that the only reasonable option for us would be the heat exchanger plan regardless of a loss of eficiency if any. Definitly can't sacrifice the entegrity of the pool just to heat the water. Thanks for your thoughts..

I have two large Aquamax pool cleaners, they work really good but seem to need alot of maintenance through the year. I'm planning on purchasing another but wondering if anyone has a recomendation on something just as good or better. Thanks

No he did not, I will check with him to see if he knows or can figure for me. I do think that even with a loss it would be well worth it in the long run for the sake of the pool and the heaters though. In a perfect pool chemical situation what would the life expectancy of the concrete be. SI at 0 I know you gave me the formula but still a little over my head. Thanks

Thanks for the replys guys, Ill try to answer some of these questions. The Heater Rep recomends 130 minimum inlet temp to prevent condesation on the outside of the heat exchanger. The heater will actually trip out on an error code when temp falls below this point for more than 15 minutes. I mis spoke about the 30 degree delta T when they were first set up the T was about 36- 37, I'm not sure why the TDS is this high, we have two smaller pools also and they are only around 900 The pool is 420,000 gallons I am located in central IL. so we have fairly high humidity through the middle of the summer. I don't know the Max flow rates for the heaters, I do know they are cuper nickle although. I think I have a good amount of flow because if I increase it any more I am unable to maintain my 130 degree inlet temp. And the heater will trip off. Last year the pool was built and put into service It was never really cleaned out properly of all the construction debri in the piping, gutters, surge tank ect. Also after the pool was filled they were still saw cutting concrete around the pool for two weeks. We had really cloudy water almost all summer. Little by little I cleaned and flushed out all that I could and then we changed the filter media. This seemed to help with the cloudyness. Could it be that I am still seeing some of this construction debri this season? Maybee this would explain the high TDS I am certainly not an expert or an engineer but I really don't see how these heaters could work in any pool situation without having scaling problems. I am consulting with a pool tech from Spear corp and he thinks we should install a heat exchanger to get the pool water out of the heaters all together, Having a glycol solution on one side and pool water on the other. I think this is a great idea because it would allow me to keep my pool water closer to 0 SI to protect the pool. Can anyone see a downside to doing this or know of anything that I am not considering? Do you guys have any experience with a setup like this for a pool? Thanks

I have two pool heaters that continue to scale inside the heat exchanger tubes. They are 2 million btu heaters which are forced air. The manufacture recomends a minimum inlet temp of 130 with a 30 degree delta T. They started out (new) with a automatic mixing valve to regulate the inlet temp. It was slow acting so the temps would climb to around 150 before the valve would start to back down the temps. It would maintain a delta T of about 37. I run the pool water a little on the corrosive side -.4 to try to keep the heaters from scaling. I really would rather keep my pool water closer to zero as it is a brand new concrete pool. Does any one have any recomendations or advise they would be willing to share? Water Chemistry.. PH 7.1 Alk. 70 CH 350 TDS 2300 Pool Temp 83 I have swapped out the automatic mixing valve with a ball valve so that I can better regulate the heater temps to keep them as low as possible. It runs 130 in and 160 out now.