Are two filters better than one?

[Poconos]

Welcome to the forum.
I actually thought about two series filters years ago for the exact same problem of fine dust. Silt from my stream I use for fill water. Wound up throwing some DE in the sand filter and that works great. Can't imagine the little bit of DE would harm anything in your yard. This info was posted on the old forum before the crash. On a 300# Hayward sand filter about 2 cups of DE raises the nominal pressure about 1 psi. Trick is to calibrate the system. For the first couple times add a little DE and wait 15 minutes or so for the pressure to stabilize. I found it takes a little time for the pressure to stabilize. Keep adding in small increments until you get about a 1 psi increase. Once you are calibrated you can dump the right amount of DE in at once. I mix it with water in a 5 gal pail before dumping in the skimmer. Of course once you get rid of the fine stuff you can revert to the plain old sand filter mode. Two filters would work too but I'd plumb in a way to bypass the cartridge.
Hope this helps.
Al
(ajs-1)

[InfinityPools]

Heres your two options that I know Of.

1. replace your sand with Zeobrite. Filters down to 1 Micron

2. Kind of a stupid looking product but it does work "Slime Bag"

http://www.cleanerpools.net/

Good luck

[waterbear]

Heres your two options that I know Of.

1. replace your sand with Zeobrite. Filters down to 1 Micron

2. Kind of a stupid looking product but it does work "Slime Bag"

http://www.cleanerpools.net/

Good luck

Even DE ONLY filters to abut 5 or 6 microns. The claims for zeolite are based on the 'pores' in the grains. However, the grains are about the same size as a sand grain and water is going to take the path of least resistance so most of the filtering will take place BETWEEN the grains, just like with sand. The filtering ability is only slightly better. It is good at ammonia scavaging, however, so it might help prevent the formation of CC. Zeolite is the new "craze" in the pool industry but it has been used in aquariums (primarily for it's ammonia scavaging properties and not for mechanical filtration) for many years now. As a mechanical filter is has proved to be not much better than sand. The "Slime Bag" is a micron filter bag. Once again these have been used in aquariums for quite some time now. They do work but have to be changed frequently and can create some (or quite a bit!) backpressure in a pressurized system. In aquariums micron bags are ususally used in non pressurized 'wet/dry' or sump filters with a low flow rate.

[KesLongwood]

ok, I've noticed that the all around answer to this topic hasn't been answered, atleast not that I have seen . Does a "Duel" Filter system work or not? I.E. A Pool->Sand->Cartridge->Pool set up with a bypass between the Sand and Cartridge connection so its Pool->Sand->Pool. Right now I have a Cyclone 200 Cartrage with a 1.5 HP Dual Speed Pump (and to me, its a *****). I have been thinking about getting a BaquaPure 2600 Sand Filter System and start using Baquacil.

[duraleigh]

Keslongwood,

The answer seems pretty clear to me. Two filters ARE better than one. In fact, three filters are better than two. Come to think of it, four would be even better. Start with sand, then into a cartridge and then into a DE.

It can be as complex as you like but, simply, more filtration will result in cleaner water. Would I ever do it? Of course not. My pool is crystal clear with a sand filter.

As an aside, I noticed the filtration at one of those huge Ripley's aquariums is sand....I think they had three set up in series.

Now, the real point of my post. I would suggest reading on this forum the experiences people have had with baquacil. You may very well rethink baquacil as your sanitizer. I'm pretty sure others will opine soon....even tho we're sorta' hijacking the thread.

[KesLongwood]

Using Baquacil is still in the air, I am however trying to get the filter for it, BaquaPure 2600 Sand Filter. Its basicly just like every other sand filter, cept its blue, and I like blue ^ ^. I did to a thread asking on where I can find one.

[Bleach=Chlorine?]

Using Baquacil is still in the air, I am however trying to get the filter for it, BaquaPure 2600 Sand Filter. Its basicly just like every other sand filter, cept its blue, and I like blue ^ ^. I did to a thread asking on where I can find one.

Are you serious?! OMFG

[waterbear]

ok, I've noticed that the all around answer to this topic hasn't been answered, atleast not that I have seen . Does a "Duel" Filter system work or not? I.E. A Pool->Sand->Cartridge->Pool set up with a bypass between the Sand and Cartridge connection so its Pool->Sand->Pool. Right now I have a Cyclone 200 Cartrage with a 1.5 HP Dual Speed Pump (and to me, its a *****). I have been thinking about getting a BaquaPure 2600 Sand Filter System and start using Baquacil.

The biggest problem I see with using two filters in line would be backpressure and flow rates. Not sure what it would take to over come them but I know it can be done because many commercial pools use multiple filters (although I don't know if they are in series or parallel. It would seem that in series they would increase the backpressure and decrease the flow rate and in parallel the opposite would happen...I know this happens in aquarium filtration because I have experienced it)

[Aranon]

I have two filters. I have A Dynaflo 1 Hp two-speed pump hooked up to a Hayward 300 lb. sand filter with 300 lbs of filter sand from Leslie's, and then it goes to a Pentair 150 cartridge filter and then to the pool. Even on low speed right back to the pool I have tremendous flow.

I have it hooked up to ten 2' x 20' solar panels on top of our two story house and on high speed it has great pressure. You can see the water current going way out toward the middle of the pool. On low speed, it does not have enough pressure to to go up two stories, but it didn't when I had it only hooked up to the cartridge filter. I leave it on low speed during the night and high speed when I am using the solar panels.

I bought the Hayward S224T used on ebay for $ 124 including freight. It looks brand new. I plumbed everything with 1 1/2" PVC. It works great.
My pool is crystal clear.

Aranon

[duraleigh]

Aranon,

On low speed, it does not have enough pressure to to go up two stories, but it didn't when I had it only hooked up to the cartridge filter.

Once your system is primed, the vertical height of any part of your system, including solar panels, is irrelevant to the pump. It will circulate thru the panels just fine on low speed.