Sand or glass filter media, which is better?

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tstephens3956
Pool Newbie
Pool Newbie
Posts: 8
Joined: Thu 13 Jun, 2013 11:16
My Pool: 18,000 gallon indoor gunite lap pool, sand filter, Whisperflow pump.
Location: Indianapolis

Sand or glass filter media, which is better?

Postby tstephens3956 » Mon 17 Jun, 2013 18:30

I am replacing the sand in my filter since the water clarity is not very good right now. I am weighing the options of putting sand in the filter again versus zeolite or ground glass. I get really mixed messages on the zeolite and the locals recommend against it and some folks are very negative on it. There is less objective information on glass but it does appear to last longer while being more expensive. I have found one objective article on the topic published by the CWC claiming that water clarity is better with glass while requiring less material.Here is a link to that study: http://www.cwc.org/glass/gl981rpt.pdf . Does anyone have an opinion on which filter media is best?


TSH Tech

Sand or glass filter media, which is better?

Postby TSH Tech » Tue 18 Jun, 2013 01:14

Glass is the better choice, then regular pool sand. Occasionally, pool sand will get gunked up affecting water clarity. Usually a good sand filter cleaner that you soak the sand overnight gives your pool sand a nice cleaning.

Zeolite - Zeo Sand - ZeoBrite
:thumbdown: :thumbdown: :thumbdown: :thumbdown: :thumbdown:
If I can give you fair warning about Zeo sand media, please take heed. I'm giving you over 5 years experience and a few lost clients in my business regarding any of the "ZEO" type sands, as well as my own personal laboratory experiment to discover why this media fails so badly :

DO NOT, UNDER ANY CIRCUMSTANCES CONSIDER ZEO SAND FOR YOUR POOL FILTER
:thumbdown:

It is a lame-duck product. Please go sand, glass or deep clean your existing sand.
tstephens3956
Pool Newbie
Pool Newbie
Posts: 8
Joined: Thu 13 Jun, 2013 11:16
My Pool: 18,000 gallon indoor gunite lap pool, sand filter, Whisperflow pump.
Location: Indianapolis

Sand or glass filter media, which is better?

Postby tstephens3956 » Tue 18 Jun, 2013 09:50

Thanks, that is good advice. I have found three brands of glass filter media: FilterGlass, ECOsmarte glass pack, and VitroClean available in the USA. There is also Viron Glass Filter media but I can not find that in the USA. Does anyone know how these products compare? Is one better than the other?
tstephens3956
Pool Newbie
Pool Newbie
Posts: 8
Joined: Thu 13 Jun, 2013 11:16
My Pool: 18,000 gallon indoor gunite lap pool, sand filter, Whisperflow pump.
Location: Indianapolis

Sand or glass filter media, which is better?

Postby tstephens3956 » Tue 18 Jun, 2013 10:42

I decided on going with ECOsmarte Glass Pack because I could purchase it for $40/50 lb bag including shipping and its specifications were as good as any alternative. Surprisingly, this is almost the same price for swimming pool sand from Amazon.com. If it is true that glass filter media lasts three times longer, than you save quite a bit both on the media and the cost/effort of replacing it.

So the question becomes, do I need to cover the laterals with pea gravel? I have read this recommendation in some pool forum. If so, where is the best source of swimming pool filter grade pea gravel? :thumbup:
TSH Tech

Sand or glass filter media, which is better?

Postby TSH Tech » Wed 19 Jun, 2013 01:25

Pea Gravel -

It's more of a filter filler than anything, allowing you to buy less bags of sand or glass. The other part of pea gravel is that first initial pouring of sand/glass into the filter, the pea gravel acts as a buffer so a rapid pour does not crush the laterals. Ultimately, the finer texture of sand or glass will settle past the pea gravel down to the laterals.
My only gripe with pea gravel ,if it's the dirty type for concrete or landscaping, sometimes that backwash rinse is not enough, and will not clean all the ultra-fine silt off the rocks and that fine silt gets into the pool and :thumbdown: ohhh my gosh, it creates a cloudy pool nightmare that will take a while to settle to the bottom and vacuumed out to 'waste'. For me, it only took 1 time to learn about the misadventures of pea gravel. Never again.

My method is simple, I skip the pea gravel, add water into the new filter about 1/4 of the way filled. Then S-L-O-W-L-Y pour the sand/glass into the tank, as to not crush the laterals. Then after all the bags are in, move to the backwash cycle to remove and rinse away any fine silts that come in sand/glass packing.
tstephens3956
Pool Newbie
Pool Newbie
Posts: 8
Joined: Thu 13 Jun, 2013 11:16
My Pool: 18,000 gallon indoor gunite lap pool, sand filter, Whisperflow pump.
Location: Indianapolis

Sand or glass filter media, which is better?

Postby tstephens3956 » Wed 19 Jun, 2013 13:17

Great advice. I presume that it is hard to find a source of clean pea gravel. I have been having that difficulty.
vitroclean

Sand or glass filter media, which is better?

Postby vitroclean » Fri 21 Jun, 2013 22:09

Vitroclean is mostly available on the West Coast, Texas and the Southeast. Where are you located?

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