The Overstock Project - Page 4 - Tropical Fish Keeping - Aquarium fish care and resources
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post #31 of 106 Old 03-07-2014, 09:11 AM
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Carbon won't leach anything back into the water. It requires some VERY specialized circumstances to get carbon to release what it's adsorbed that will NEVER occur in an aquarium. I think it's like 800 degrees in an oxygen free environment. Once the adsorptive capacity is used up it just becomes biomedia.

That all being said, you should ditch the cartridges as they are not the best medias.

125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
90 - Congo tetras, african knife, upside down cats, spotted ctenopoma, kribensis, delhezzi bichir
2.5 - betta
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post #32 of 106 Old 03-07-2014, 09:15 AM Thread Starter
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Can I switch the cartridges with poly-fill that isn't in sheets or does it have to be in sheet form?
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post #33 of 106 Old 03-07-2014, 09:20 AM
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I like aquaclear sponges. That's all I would put in the HOB, if you are insistent on running it

125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
90 - Congo tetras, african knife, upside down cats, spotted ctenopoma, kribensis, delhezzi bichir
2.5 - betta
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post #34 of 106 Old 03-07-2014, 09:28 AM Thread Starter
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I just figure the more bio media the better. I'm going to do some window shopping online.
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post #35 of 106 Old 03-07-2014, 09:32 AM
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Everything you put in the filter is biomedia

125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
90 - Congo tetras, african knife, upside down cats, spotted ctenopoma, kribensis, delhezzi bichir
2.5 - betta
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post #36 of 106 Old 03-07-2014, 09:36 AM Thread Starter
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Yes, but some are better than others, that's why certain filter media is considered mechanical and the likes. I always aim for high bio low mechanical. Mechanical should be taken care of for the most part with WCs IMO.
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post #37 of 106 Old 03-07-2014, 09:40 AM
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If I were you I would fill the tom rapids with biomedia such as biomax or matrix and put sponge in the HOB. Will make cleaning the mechanical media significantly easier than having to break down the canister.

125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
90 - Congo tetras, african knife, upside down cats, spotted ctenopoma, kribensis, delhezzi bichir
2.5 - betta
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post #38 of 106 Old 03-07-2014, 09:53 AM Thread Starter
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Alright, I'll probably do that. How well does the plastic filter sponge hold BB? Probably not awesome or HOBs would have better ratings, haha.
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post #39 of 106 Old 03-07-2014, 10:06 AM
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The problem with HOBs is the minimal amount of media they hold.

There are 2 main variables that work together to determine the strength of the bacteria colony. Variable 1 is real estate - gotta have enough surface area for the bacteria to colonize. Variable 2 is turnover rate - the faster the water is turned over the lower the ammonia concentration entering the filter. HoB filtered tanks need a higher turnover rate than canisters because they don't house much media. You will often see 10x turnover suggested for HOBs, and 5x for canisters, and that is why. My overstocked tanks were always heavily filtered - close to 10x from canisters.

125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
90 - Congo tetras, african knife, upside down cats, spotted ctenopoma, kribensis, delhezzi bichir
2.5 - betta
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post #40 of 106 Old 03-07-2014, 10:19 AM Thread Starter
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The canister alone will be 8x turnover. I was aiming for 10x but it just doesn't seem feasible in this tank. Even though the HOB won't do much, I feel better having the extra filtration.
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