Tender Roots
I have 7 healthy mangroves in a tall (15"x30"x45"?) tank that is half full. So, envision a tank that is taller than it is wide. The substrate in my tank fills roughly half-way upward on one side of the tank, with driftwood as a barrier in the centre, leaving the remainder 50% of the tank's bottom with roughly only a 2" substrata, compared to the other half's 7-10" depth. The mangroves are planted in the section of the tank with the deepest substrarta. As my seven (of originally 9, see below) mangroves reach the height my tank's rim i will then level the substrate, evening it throughout the bottom of the tank. When they, once again, reach the tank's top (and thus the my light's glass-platform -- a local glass shop cut it to my specification for maybe 20USD) i will either research the material for a higher-powered hanging light or websearch mangrove pruning tactics (i'd like them to form multiple branches, not just 1 upward with multi-rings of leaves on each).
Mangrove Murder... Top & Bottom Methods Explored:
Preface: I should first disclose that i'm a theorist more than a practicalist. I researched and purchased mangroves for their natural-filtering mechanism. I hate water changes: i love the concept of a bio-sphere that requires minimal human maintenance/intrusion (i.e., i'm a prtentious lazy ******* who hates changing water or subtrate-cleaning!). So, enter 9 Mangroves and let the drama begin. Note: These things are expensive if you live in the colder areas of our little sphere!
[1 - Murder by Bottom]
The hardest part about utilizing the cleansing properties of mangroves in a pre-existing tank is planting the tender things. I used rocks. In so doing i, somehow, managed to work out a techinique of weighing down the root of a plant with one or more sea rocks (so nice-n-flat!) and then hand-shoveling substrate on top of it all, slowly weighing down the plant in a stable mound of rock and sand. It's a little tricky. Tricky technique or not, i also broke more than one plant's root system (2! ..and they later perished). I should've been more gentle. I should have taken my time. If you feel a root crack, you're mangrove is in trouble. I would recommend purchasing some plyable metal lead strips that can be wrapped around the mangrove's base, and then easily covered over with substrate while the plant remains weighted down in position. I discovered these at the local superpet_mecha_store only after my mangrove murders.
[2 - Murdering Top-to-down, slo-mo]
Remember that glass platform i mentioned that supports the light from on-top? Well, in an effort to keep moisture inside the tank (remember, i want to do less water changes! i hate effort!) i made sure the glass top of the tank kept most of the moisture from escaping. The subermisble-filter's and heating-element's electrical cords, however, lifted the glass plate away from the tank's rim maybe only a centimeter allowing some water vapor to escape. I thought it was sufficient aeration. I was wrong. The leaves were constantly moist, which i initially thought was a good, healthy condition (dreaming of a Jurasic-Park type mangrove_utopia). But, horror -- mold started to form (and kill!) 1 mangrove plant whilst away on business.
So, thusly so, 9 became 7.
Lessons Learnt:
[a] Aclimate your plants after shipment. Expose them to light, but keep the root-systems moist halfway in a container of your tanks water (not completely submerged). Do this for a few days, no rush. Let the plants unstress from being sealed and packed. Trust me, this helps merely from my horticultural experiences, never mind mangroves. This is the first step in learning to treat these plants with tenderness.
Take your time planting them in your tank. Do it gently. Never grab the root system and push it down in the substrate. *Place* the mangrove on the bottom, and then just slowly cover it with substrate. Be gentle and slow and use the task as a moment to relax -- enjoy the process of planting these amazing plants. This is a hobby, not a task. Remember?
[c] Take pains to make sure their leaf-system is dry. Mold is a quick mangrove killer.
Hope this helps!
Do not abandon these plants; They are the perfect compliment to your tank!
Try again, be slow, and be *gentle*. REMEMBER: Natural solutions are the best solutions. Technology is a short-cut, and short-cuts *always* have negative consequences.
Learn to build beauty *within* the flow of nature.
I never change my water or clean my substrata in my brackish tank, almost 2 years now. I only add water, and only little each week, from its neighboring 40g freshwater convict cichlid's tank.
Hope this helps on the Mangrove front.
("Enjoy the process, it's just as fun as reaching the goal.")
rob@egoz.org