koiguyoz
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Nov 11, 2006, 3:38 PM
Post #2 of 2
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Re: [bboop321] salt and bacteria
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It would be a good idea to purchase either a refractometer or hydrometer to measure the salinity (the saltiness) of the water. This way you'll know how much of the water frmo the well is composed of salts.
Battling green water is best done with an effective biological filter.
Sand, although having a large surface area clogs and clogs very quickly. I'm sure you've experienced the need to flush the sand more than once a week?
*How do you wash your biological filter? With tap or pond water?
*How large is the pond?
*How large is the filter?
*How many hair curlers have you used?
The green water is composed of phytoplankton (tiny tiny tiny microscopic plantlife) that exist on the millions and billions in population. They are small. Normally around 5 microns small. Mechanically it is hard to filter them out.
You can use a UV light to combat green water. It works by exposing passing phytoplankton to light in the ultraviolet frequency range which in turns destroys them. However, you are then left with the dead phytoplankton which an ineffective biological filter can't process (which is the reason you had green water in the first place).
My best advice is to create a larger biological filter (much cheaper than buying a massive commercial made filter - which of course you can spend your money on). One effective biological filter is the trickle tower - use bioballs over lava rocks - I have used both, lava rocks are fast to work, but bioballs have better surface area for the good bacteria (that consume the wastes that contribute to the green water). You can use lava rocks in the bottom 1/4 of the container.
Overall, I think the sand filter is not effective in your application, but you can use it as a potential settlement tank and then direct its output to a home made trickle tower that will output to the pond.
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