Mangrove Tank - Tidal Retrofit
I've had this 20 long dirted brackish mangrove tank for about a year and a half. I made the mistake of putting the propagules directly in the substrate, so they never developed any stilt roots.
It is my understanding that, once rooted, the only other way to get mangroves to grow stilt roots is to stimulate tides. I really didn't want to strip this tank down, drill an overflow, buy solenoids, etc., so I came up with the below tidal retrofit hack.
A pump in the 20 gallon display tank sends water into the 10 gallon reservoir. When the reservoir is full, a bell siphon activates, emptying its contents back into the 20 gallon via a (very poorly made) diy spray bar. The full tidal cycle is only about 15 minutes.
By design, this system does not replicate the timing and flow of a real world tide. In the interest of reducing cost, time, maintenance, and failure risk, I did not want to build anything with pumps and timers, and I just don't have the information to know how (if it's at all possible) to build a bell siphon that drains a tank over the course of 6 hours.
My hope is that mangroves will grow stilt roots when agitated by changing water level, regardless of the timing. I will come back and let you guys know if anything comes of this hope ~6 months from now (omfg mangroves grow so slow...).
The setup still needs some improvements. The temporary water intake I made is completely hideous, and you have probably already noticed some rather sketchy, unattractive measures taken to increase the height of the reservoir. Would also like to adjust spray bar to not agitate the water so much - I am likely losing a lot of carbon from this. Will post more pictures + video soon.