Newsletter_Final+Vol+1_Issue1.pdf. Deep Sand Beds. By Deirdre Kylie What is a deep sand bed?
A deep sand bed is a sand substrate coupled with bacteria and multicellular organisms working together as a powerful biological filter. Originally developed in the saltwater aquarium hobby, deep sand beds (DSBs) extended the biological filter from converting ammonia and ammonium to nitrate, to eliminating nitrate by denitrification - using the oxygen in nitrate, releasing harmless nitrogen or nitrous oxide. This was desirable because of saltwater organisms’ great sensitivity to nitrate. In freshwater, nitrates are much less toxic, requiring infrequent water changes to control levels, but the freshwater DSB as described in this article does more than eliminate nitrate.
How does the Freshwater DSB work? Primarily, freshwater DSBs are biological filters, eliminating ammonia, nitrite, nitrate, hydrogen sulfide, byproducts of decay, and solid waste (mulm). How deep sand beds work. © Deirdre Kylie Principles by which effective Freshwater DSBs operate 1. Basic Aquarium Fertilizer Dosing. Basic Aquarium Fertilizer Dosing Note that these are guidelines and this is NOT a comprehensive dosing guide. There most likely are rounding errors.
To check the numbers your self you can do a Google search for Chuck Gadd. He has a on-line calculator on his web site and a Windows calculator that you can download. You can also go to Aquatic Plant Central , (requires registration). I highly suggest that you invest in a digital gram scale with at least 0.1 gram accuracy. You can pretty much dose everything at once with one exception. Plantex CSM+B: Mix 2 tablespoons (30 grams) with 2 cups (473 ml) of water. 1 ml of this solution will add 0.1 ppm of iron to 10 gallons of water. Aquaponic Lynx - Aquaponics Systems, Supplies, Designs, Florida, USA. Dr Wilson Lennard on Commercial Aquaponics Design. Recently Ecofilms Jane Gapinski caught up with biologist and aquaponics consultant Dr Wilson Lennard who was running a little experimental commercial aquaponics system located at CERES a community farm and education center located in Melbourne, Australia.
This community aquaponics system was not designed by Lennard but he was invited to take it over in an attempt to make it work profitably. The produce that is harvested is sold to the local cafe located at the site. Dr Lennard in the video points out a few design flaws and shares some tips on improving a system for commercial application. Note: Dr Wilson Lennard has asked that this video be removed Jane whipped out her little camera and filmed this interesting little rave from Dr Lennard about what you should consider important when designing your own commercial system. He feels that the width of the floating raft troughs at CERES are too wide and ergonomically difficult to manage when it comes to shifting the floating raft trays around.
Searchable Databases: ATTRA - National Sustainable Agriculture Information Service.