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New Tank Syndrome

3322 Views 3 Replies 2 Participants Last post by  bioguy
I've got a new 35 gallon tank planted with Vals, Sagittaria, and 2 types of Swords. The plants died back during tank cycling and it took about a month for this to stop and get to 0 Ammonia and 0 Nitrite. It was capable of cycling a teaspoon of Ammonia over night. I understand tanks well but this is my first true planted tank.

I added the first fish, 12 small (1cm) Green Tetras and the tank got VERY cloudy within 18 (mostly at night) hours. Ammonia and Nitrite have risen but are within the low range. I understand NTS but this seems like a very low bioload considering the amount of rotting plant the tank was converting prior to adding fish.

This has never happened to me.

The only new variable is that the tank had thriving colonies of several types of micro-life---daphnia, cyclops, limpets, 1/2 cm flatworms, small nematode looking worms, something tiny that the cyclops were hunting and something that looks like a fan coral (suspected hydra)---that developed while the tank was cycling (I got my plants from an established Shrimp tank that had these at low densities). When I put the Tetras in they went crazy and appeared to feed no stop for a couple hours (on something to small to see...the same thing the cyclops were eating if I had to guess). While I can't imagine the nutrient load from this feeding was sufficient to cause a crash, could the Tetras have consumed so many of the "unidentified critter" that the food wed went out of whack...allowed bacteria to bloom leading to the cloud.
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I couldn't tell you for sure why you had the spike, but plants do not die off because a tank is cycling. In fact the plants utilize ammonia during photosynthesis. Given proper levels of nutrients, light, and co2, plants will do well in tanks regardless of whether they are cycled or not.

So you cycled your tank with liquid ammonia? The only thing I can think of is if your plants were processing the ammonia rather than the tank itself building up the colony of beneficial bacteria. That seems unlikely though because that would take a lot of plants to handle the addition of pure ammonia, depending on how much you added. I would just let the tank cycle with the new additions and keep an eye on it. Also if you add a bunch of Prime water conditioner it will treat the ammonia and could inhibit the formation of beneficial bacteria.

I don't know about all the micro life in the tank. I didn't think that anything ate the beneficial bacteria. I think a bigger issue is dealing with hydra in a shrimp tank as those things can kill shrimp populations.
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