Kitty litter substrate
Posted 06 June 2011 - 10:55 PM
I used WalMart brand Special Kitty litter, it being the only one I was sure didn't contain leachable chemical additives. Labels on any of the available brands were not helpful in determining their contents, but all of them made some sort of claim like "odor neutralizer" or something that suggested an additive.
The tank was set up somewhat hastily because the air pump that was powering the sponge filter in the moving bucket had failed two days before the tank was delivered and I was in a hurry both to address aggression due to overcrowding and underfeeding and to alleviate the rapidly deteriorating water conditions. The bucket was overstocked to the point that twice daily 90% water changes were not keeping it from smelling bad (though they did seem to stress the fish). I ended up just dumping in a 25 pound bag of kitty litter and pouring water on top of it unrinsed. This is definitely not the recommended procedure, but due to the chaos of moving I didn't have a second bucket to rinse with. In retrospect it might have even been better to fill the tank with water, add the fish, and use that bucket to rinse the substrate. I didn't do that because I wasn't sure if the litter was fired or not, and thought it might soften in water and muddy up even if rinsed. It turns out the particles hold together pretty well and that probably would have been fine.
Pouring water over unrinsed litter resulted in extreme turbidity with only about an inch of visibility. I ended up not adding the fish for another 18 hours while I ran two large sponge filters with air pumps and an Aqueon 55 hang-on-back filter to try to clear the sediment. After two days the water was reasonably clear but I still thought a large water change would be needed to remove the remaining silt. At this point I removed one sponge filter, leaving the cycled one that had traveled with the fish, and rinsed out the other in tank water. Both produced a huge amount of silt when squeezed. The HOB filter pads were essentially clean. It does not appear to have made any significant contribution to the cleanup. Unfortunately I have no pictures of the tank during this period as it just wasn't a priority. At this time I added the plants that traveled with me.
By the third day the water was crystal clear and has remained that way. Moving plants still stirs up a small cloud of silt, but it settles quickly. After two weeks I replaced the air pump on the sponge filter with a 160 gph powerhead and removed the HOB filter because even with an excessively high water level it was causing too much downward current underneath it which was both stirring up the substrate and splashing the light fixture. One thing I noticed in the move was that the light's reflectors had developed hard water deposits that were probably diminishing its performance. After trying to clean these, and replacing the bulbs, I could see a marked improvement in the color and brightness of the light. The powerhead was significantly larger than I had intended, but was the smallest available at the pet store. The hardware store I checked had some smaller capacity pumps but they all had intake screens on both sides of the housing rather than a pipe, so they weren't suitable to power a sponge filter.
Here's a series of pictures of the tank today, arranged from left to right:
On the left are some miniature amazon swords (purchased) and some Ceratophyllum demersum collected in SC. The hornwort is entwined in a plastic plant of similar appearance to anchor it to the substrate. On the right side of the first picture are some Rotalla and an unidentified aquatic grass also collected in SC. The second picture shows the middle of the tank with the sponge filter and powerhead partially hidden behind a stand of hornwort and flanked by a pair of amazon swords. Behind the sword on the left and barely visible is a banana plant, also from SC. The right side of the tank has just one Anubias on a piece of driftwood and some silk plants. This area of the tank receives heavy flow from the powerhead which makes it difficult to keep plants anchored there. The shiners seem to appreciate the current sometimes though. The Val survived the trip but not the replanting. I had some pieces of water lettuce too (this and the Val also collected in SC) but only the smallest sprig survived the trip. I'm interested to see whether it makes it. This had been by far the dominant plant in the tank before the move due to its ability to access atmospheric CO2.
The tank currently houses four bluespotted sunfish, one American eel, three shiners, one swamp darter, one Gambusia and three golden topminnows. I might like to add more darters later, but unless I can bring the temperature down that isn't going to happen. The tank has 216 watts of light shining on it, which is keeping the temperature high. All the plants are pearling and streaming little oxygen bubbles. Unfortunately so are several species of algae, so I may be able to cut down on the light some.
Further photos will follow as I hopefully get the algae under control.
Posted 07 June 2011 - 09:56 AM
Hopefully the algae problem will get resolved soon. Cat litter is just like any other non-gravel substrate - it's nutrient content depends on where it was mined. Even within a single brand, it is often mined in different places. It is possible to have cat litter contribute to high phosphorus loads.
Since you have Ceratophyllum in your tank, I would NOT recommend using peroxide for algae control. It seems to melt that particular species. I have not had that problem with any other species, but there are probably a few others that are sensitive as well.
Let us know how the tank progresses!
Posted 07 June 2011 - 10:23 AM
Thanks for the tip. I was thinking I might still try a small amount with the pump turned off though, more out of curiosity than for algae control. I think peroxide decomposes fast enough that it might not make it far in the tank.
Posted 07 June 2011 - 11:24 AM
Do you remember where you saw it? I'd like to read what she found.
Posted 07 June 2011 - 12:04 PM
Edited by farmertodd, 07 June 2011 - 12:05 PM.
It's never too late to have a happy childhood.
Posted 07 June 2011 - 07:25 PM
Posted 07 June 2011 - 09:16 PM
Edited by EricaWieser, 07 June 2011 - 09:22 PM.
Posted 07 June 2011 - 10:57 PM
Is there any way you can adjust your powerhead's outlet to agitate the surface of the water? It'll help a lot with your scum and get more CO2 into the water (unless you're adding it already.)
In any case, good luck with your tank!
Posted 08 June 2011 - 10:22 AM
Hangin' on the Neuse
"Taxonomy is the diaper used to organize the mess of evolution into discrete packages" - M.Sandel
Posted 08 June 2011 - 11:26 AM
The article is about controlling noxious aquatic weeds (and algae) using peroxide - the intent WAS to kill/damage the plants. It's been a long, long time since I took chemistry, but the concentrations that were used in the study seem very high to me. They used 1 and 2 mM solutions of hydrogen peroxide. When treating algae in tanks, I typically use 1 oz per 10 gallons of 3% peroxide.
I can't really do the math to compare these concentrations. Maybe Erica can help.
Posted 08 June 2011 - 07:09 PM
I can't really do the math to compare these concentrations. Maybe Erica can help.
From website http://answers.yahoo...03214038AAGDreQ , 3% hydrogen peroxide = 0.88 moles/Liter
(0.88 mol / Liter ) * ( 0.0296 Liters / 1 US fluid ounce used ) = 0.0261 moles of hydrogen peroxide added to the tank
10 gallons = 37.85 Liters
0.0261 moles / 37.85 Liters = 0.000689 Molar hydrogen peroxide
Posted 08 June 2011 - 08:15 PM
Posted 08 June 2011 - 08:54 PM
The Planted Tank forum is nice for additional information on this sort of thing. Most of the information is for tropical tanks, but it applies to cold water as well.
Posted 08 June 2011 - 10:30 PM
I agree. All of my tanks have gone through a series of different kinds of algae for the first 6 months or so, but once the plants were established or I added water lettuce or hornwort, the algae disappeared. It's virtually non-existent in my tanks. I've also read that Excel kills algae. I use it in my largest tank (started about 6 months ago), and I can recommend it for plants if you want to stay real low tech, and I mean not even DIY CO2. It made a dramatic difference in plant growth.
Posted 11 June 2011 - 10:22 PM
Any guess at ID on that? Obviously it's upside down. It was collected in very shallow water in full sun on the edge of a permanent swamp near Charleston SC.
Here's a commercial plant, still with some adherent potting material, uprooted by the eel:
The front glass is requiring cleaning about every 3 days to maintain visibility. I'm not trying to eradicate algae from the tank; usually I prefer to manage it with a large snail population, but my pond snails have been completely extirpated. Going to have to look for some one of these days. Large ramshorns have survived, but all young are gone and I see no evidence of eggs hatching.
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