Eco Complete Sub.. Good Eco System?!
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Eco Complete Sub.. Good Eco System?!

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Eco Complete Sub.. Good Eco System?!
Old 04-15-2011, 12:12 AM   #1
 
Eshnon's Avatar
 
Eco Complete Sub.. Good Eco System?!

Hey,
So for my 75 gallon, I bought Eco Complete Substrate that supplies many nutrients to the plants, but also provides bio breakdown that converts the waste into nutrients. My question is, will this substrate+well planted tank+a medium bio load limit the amount of water changes? I want to perfect a cycle that will not need my help. Also, would ferns help with this perfection? Discuss, please.
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Old 04-15-2011, 04:56 AM   #2
 
I think there'd still be a build up of nitrates in that setup requiring requiring water changes

Try googling the 'Diana Walsted' and 'Tom Barr Low Tech' for ideas
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Old 04-15-2011, 09:46 AM   #3
 
Quote:
Originally Posted by Eshnon View Post
Hey,
So for my 75 gallon, I bought Eco Complete Substrate that supplies many nutrients to the plants, but also provides bio breakdown that converts the waste into nutrients. My question is, will this substrate+well planted tank+a medium bio load limit the amount of water changes? I want to perfect a cycle that will not need my help. Also, would ferns help with this perfection? Discuss, please.
Fresh water is only fresh because nature constantly renews it in rain water. Rivers, streams, ponds, lakes they are all renewed all the time. This is especially true in the tropics where it often rains every day.
So we take a slice of this nature enclosed in glass in our house and try as we might with fancy filters and plants and cycling and bio-magic...we STILL need routine fresh water changes to keep the environment good for the inhabitants - YOU are the rain weedhopper
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Eshnon (04-15-2011)
Old 04-15-2011, 01:10 PM   #4
 
Though you cannot completely escape WC. You can certainly setup a tank with the goal of say doing only a few water changes. How long a tank can go depends on A LOT of factors. You can have a healthy tank that needs 50% weekly while a healthy tank that only needs 50% every 4-8 weeks is possible.
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Old 04-15-2011, 01:27 PM   #5
 
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AbbeysDad has hit the nail on the head. If I may, I will just expand a bit, as I know there is conflicting information floating around on water changes with planted tanks, and some of it is not entirely accurate.

If you check into the Walstad or Barr methods, they recommend few to no water changes in low-tech ("natural") planted aquaria. I myself had a good discussion with Tom on this very subject, and we have differing views (which is fine). But something we all agree on (including Ms. Walstad) is that the fish load must be moderate and the plant load fairly heavy.

In a "perfect" system, with few fish and well planted, in sufficient volume of water, the plants could handle most of the "stuff" that we would otherwise remove with a water change. Nitrates is only one aspect of this, and in planted tanks the least important since the plants in a ":natural" setup ensure nitrates are minimal. There is more importantly what one author called "crud" that includes not only the dissolved waste and urine but also pheromones and such chemicals released by fish (and perhaps some plants, thinking of allelopathy or allelochemicals released by plants). It is believed by some that plants can handle all this, but the fish load must be proportionally low.

Most of us prefer stocking more fish in an aquarium. A group of 8 neon tetra in a thickly-planted 55g tank was one author's estimate of the maximum fish load for this to work. I'm not suggesting this is or isn't accurate, but it is food for thought.

The safer approach for our fish is to do a regular partial water change. As the prior member very correctly pointed out, in nature fish are always in "fresh" water. The ratio of fish to water volume itself is so enormous by comparison to the largest aquarium that we cannot even begin to come close. The only way to dilute all this "crud" is to remove it with a water change. No filtration system will duplicate this.

So now we come to the substrate. In any substrate in a planted tank, organics (the waste) gets broken down by bacteria in co-operation with the plants. There is a complex biological process involving the water flow through the substrate, aerobic and anaerobic bacteria, and plant roots. This occurs in any healthy substrate.

A substrate that releases nutrients should be an advantage to this biological process, but this does not directly affect the need for water changes. Only the number of fish--and the type/size--in relation to the number and type of plants and the volume of water really affects the frequency of water changes. The more plants and fewer fish, the less water needs to be changed to maintain a certain level of health. But the affect of water changes on fish behaviours and health cannot be denied, and this alone is positive proof of the benefit of any water change, and the more the better.

I change 50% of my tanks every week, and have done for more than 15 years. I have gravel in some tanks, sand in others, and Flourite in one. I am not aware that this in any way impedes plant growth. But I am aware without any question that it improves fish health. And that is the important issue.

Byron.
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Old 04-15-2011, 01:46 PM   #6
 
You might want o keep in mind that the bag of that stuff says that it will effect PH for a few weeks until it becomes inert.
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Old 04-15-2011, 02:03 PM   #7
 
mine never did, but it will depend on your water's buffering ability...
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Old 04-15-2011, 06:19 PM   #8
 
I have soft water. My water board said 44-77 (PPM?). So I suspect that that might be the reason it's raised mine slightly. I went from a 7.6/7.8 to a 7.8. But I've been doing 30% water changes on the tank from Day one (6th week) on wednesday and Saturday. So far i don't see a large swing, maybe .2.

I didn't know it when I bought it that it could effect PH (for a limited time), so I wanted to inform a potential purchaser.
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Old 04-16-2011, 12:05 AM   #9
 
I see... .2 is minor. I use pressurized CO2 on the specific tank I added eco complete to. Its quite possible any effects were masked. My tap is 7.6 tanks I run between 7-7.4. pH always rocks back and forth.
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