Anubias Rot

[mnemikeevans]

Hi all.

I set up an Anubis tank about 4 months ago and pretty much straight away about half my anubias starting dying.

The rhizomes aren't buried at all and I'm dosing the EI method 40ml a day with CO2 fire extinguisher using an up inline diffuser.Weekly 50% water change using tap water with prime. I also add flourish iron around once every 10 days or so.

It also has a hydor inline heater set at 24.5'.

The filter is a fluval 406 with a spray bar on the right pointing left along the surface 1 inch below the surface. It also has a hydor 900l circ pump just below the spray bar. The tank is a fluval Roma 200l.

Substrate is silica sand and the plants are tied to bog wood.

All levels are fine
Ammonia 0
Nitrites 0
Nitrates 20
Ph 7
Kh 5
Gh 9

Lighting is on from 1600 to 2200 using two t8 18w daylight bulbs.
No sunlight hitting the tank.

Stocking is 1x leopard bush fish 12x Congo tetra and 3x upside down catfish.

The anubias rhizome just seems to start rotting and the leaf breaks away from the rhizome. Eventually the whole rhizome turns to mush.

I'm thinking some sort of bacterial rot.

Anyone know how to solve this?

 

[mnemikeevans]

Anyone?

 

[three-fingers]

Everything sounds good, but with most of the circulation coming from your 406 and it also being on a spray bar, you may find that some extra circulation will help.

External filter flow rates are calculated by the manufacturer and only apply to the pump when there is no media in the filter and usually not pumping against gravity, depending on the manufacturer. Putting any media in the filter and adding a spraybar drastically cuts down the flow rate, especially when it gets a little dirty. Add in the fact that you are also injecting CO2 inline, you probably have significantly less than the recommended 10x turnover per hour for a high-tech CO2 injected tank. The 10x is just a guideline, many tanks do great with much slower flow, some tanks need much higher flow to avoid algae issues/CO2 plant deficiencies, just depends on hardware, plant species and layout of the tankscape.

I've only had Anubias rot when it was getting too much light and not enough circulation too near the lights in a 550l, with no CO2 added, but getting adequate flow using just powerheads and external filters was very difficult for that tank. Pointing a cheap wavemaker directly at the wood it was growing on fixed the issue. Try re-aiming your Hydor pump so the Anubias has a faster over it flow? An additional pump would cause no harm and could be of great benefit too.

 

[dw1305]

Hi all,
There are a <"few threads"> on Anubias melt.

Anubis tank about 4 months ago and pretty much straight away about half my anubias starting dying. The rhizomes aren't buried at all and I'm dosing the EI method 40ml a day

Does the tank only have Anubias plants in it?

If it does I might drastically chop down the fertiliser addition. It is only a hunch, but I have low nutrient tanks and all the various forms of Anubias barteri have done well for me, with the exception of this incident <"My unfortunate vacation...."> .

cheers Darrel