Allelopathy in Crypts - Page 3 - Cryptocorynes - Aquatic Plant Central

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Cryptocorynes Cryptocoryne plant species consists of 50+ plant species, and make a unique addition to a planted tank.

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Old 01-05-2013, 06:40 AM   #21 (permalink)
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Default Re: Allelopathy in Crypts

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Originally Posted by Yo-han View Post
Wonc't deny the possibility of this happening, but my val and wendtii brown grew like crazy in the same tank. Also C. balansea C. 'Mi Oya' and giant vallisneria in the same tank on my work grow more than fine. Maybe the regular water changes wash away the toxins. Are people having this problem doing regular large water changes? And if not, is someone willing to do like a 50% water change weekly/biweekly?
the water changes point could be a good one..thought i make 50% or so every two weeks more or less.. i also have many other species mixed together sucha as cordata blassi, xwillisii, nurii, balansae red, retrospiralis, all growing in the same tank, a 75 that is..no issues ever
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Old 05-25-2013, 02:25 AM   #22 (permalink)
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Default Re: Allelopathy in Crypts

I'm new to this forum, but I have had aquarium since I were a little gay.
I do have several setups, some with automatic water changes and some without. Those with automatic water changing do have greater species diversity, in the other setups with more random water changing more or less crypts take over.
It can be caused by illumination/reduced lighting or number of fish, but I'm not sure.

After I have gotten back planting interest, I keep most Cryptocoryne separated into their own square pots and without elements of other plants. And in this way can easily change from submerse to emerse.
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Old 05-25-2013, 07:51 AM   #23 (permalink)
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Default Re: Allelopathy in Crypts

I have two tiger lotus. The one that's planted among a patch of wendtii red doesn't grow at all, the other does fine.
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Old 06-02-2014, 06:46 PM   #24 (permalink)
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Default Re: Allelopathy in Crypts

I've recently have ALOT of trouble with a certain area of my tank being completely killed off by another plant. Here is the scenario:

Once upon a time when I first setup my tank I tried to plant Cryptocoryne Retrospiralis but in the process ending up damaging the tuber/rhizome and threw the plant into another tank to recover. I planted Cryptocoryne Sp. Affinis in it's place and Cryptocoryne Cordata 'Rosanervig' a few inches away (5-6). Roughly 3 months later I noticed a new plant growing among my Cryptocoryne Sp. Affinis which turned out to be Cryptocoryne Retrospiralis. As the C. Retrospiralis continued to grow and get larger and larger, I recall a specific day where all of a sudden I woke up to my C. Sp. Affinis COMPLETELY melted, every single leaf!!! as well as a large portion of a very large C. Cordata 'Rosanervig' completey melted. I didn't do anything different in my aquarium, I was sure to test all my levels and nothing was out of wack besides very low nitrates 5ppm.

My only conclusion is that the C. Retrospiralis began to compete with the C. Affinis and C. Cordata as it began to delevop and sent out some kind of toxin to kill everything surrounding it.

Any thoughts?
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Old 06-02-2014, 08:33 PM   #25 (permalink)
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Default Re: Allelopathy in Crypts

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Originally Posted by fnyb View Post
I'm new to this forum, but I have had aquarium since I were a little gay.
I realize that was a typo, but it was kinda funny.
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Old 12-28-2014, 02:30 PM   #26 (permalink)
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Default Re: Allelopathy in Crypts

After reading about allelopathy in the Ecology of the Planted Aquarium this topic has really piqued my interest! I've had C. wendtii "green", in two of my previous tanks. The first time I tried them I had an unrecoverable melt, they were planted in 2mm gravel with no vacuuming in pretty bright light and a relatively young system. The second time I planted them in my 55g in sand with root tabs in a tank that had been set up for a few months in a shady area beneath some E. blehri and some monstrous H. diformis(this area proved difficult to remove all the accumulated mulm from my peckoltia). This time the crypt thrived and almost tripled in size over a few weeks sending out daughter plants and those joining the original creating a lush patch of crypt. I even eventually pulled up some of these daughter patches and replanted them in a low-tech 10g with the overgrowth from my Wisteria from the main tank and about three A. ulvaceous. These thrived in here as well with no melt in either instance. Sadly, on a three day vacation my roommate didn't turn on my tanks lights once and all these crypts in both tanks completely melted back with no recovery. I now have an unknown crypt in both of my NPT there are doing very well so far. Anyway - as I read this thread regarding alleopathy I keep thinking to myself instead of potting the suspect crypts why not put inert sheets of material between the groupings(glass/fiberglass/acrylic/slate, etc)? These can be easily covered by the substrate and allow for the natural spread of the crypts into a larger area without being confined to a pot. And, since it SEEMS that most of these alleopathic chemicals are released through the soil/substrate this SHOULD prevent this. Then any of these chemicals potentially released into the water column can be removed through water changes. Walstad also says that these chemicals can be removed through the use of activated carbon. Just a thought.
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Old 12-29-2014, 08:56 AM   #27 (permalink)
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Default Re: Allelopathy in Crypts

Unless if you glue those strips of material (glass etc) straight on the bottom of the aquarium, there is a fair chance that crypt runners grow underneath and plantlets pop up where you don't want them. (they can also grow over ... )

Last edited by illustrator; 12-29-2014 at 11:34 PM..
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Old 12-29-2014, 09:58 AM   #28 (permalink)
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Default Re: Allelopathy in Crypts

Illustrator.. good point - I've never tried it and have little experience with crypts so I didn't take runners into consideration.. this is why I like forums like this.. they're like giant think-TANKS(no pun intended lol)! When we put our heads together we get great results!
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Old 12-29-2014, 11:39 PM   #29 (permalink)
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Default Re: Allelopathy in Crypts

I tried growing crypts in pots for a while, but it did not end well. I put as many pots as possible in my aquarium and in the end the growth was dense. Even when their roots were in separate pots they competed for light and nutrients with their leaves. The result was that some species florished, but others did poorly and eventually died. Because of this I abandoned the pots-submersed growing and planted them more spaced out (well, a very little bit more spaced out) in river sand, like I did before. In my experience, it is not a problem to grow a dense single-species stand but to grow different species side by side they need space to breathe.
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Old 02-24-2015, 03:02 PM   #30 (permalink)
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Default Re: Allelopathy in Crypts

My two cents for what its worth. I once had willisii, parva and wendtii-brown growing well together in my 59 with a sand, decomposed granite and river rock sub. No co2 injection and rarely water changes. I did have some stick ferts pushed in all around them and dosed with iron and carbon semi regularly. I had all three growing well for over 2 years even filling in the gaps around one another. It wasn't until I busted up that tank and sold everything off except a couple wendtii, parva and willisii that I started to have problems.
I did not put these back into a tank but a fish bowl with no light, heater, substrate, pump or anything but cold distilled water. I had this bowl sitting on a table by a north facing window for over 1 year. To my surprise the wendtii turned completely green shrunk but still grew just suspended in the water. I think the parva died off sometime mid way through and the willisii was nowhere to be seen until replanting these in a 3 gallon with pure sugar sand.
I grew these back up for another 2 years in a 3 gallon tetra half moon. to finally move them into the 10gallon with Kitty diggins sub, small injected co2 system with floating needle... well, they took off in the ten with a dose of co2 and as far as I can tell all I have is a bunch of wendtii but they look good!
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