Fish-in Cycling

finchfarm

Fish Fanatic
Joined
Feb 12, 2007
Messages
155
Reaction score
0
Location
Florida
As some of you may have read, due to unforseen circumstances, we had to completely drain, throw away the gravel, and replace the filter media on our 75 gallon tank due to a bacteria infestation. We took our old fish out of the 75 gallon and placed them in a 20 gallon hospital tank which also has completely replaced filter media. In essence, I have two tanks that are uncycled.

I'm still living at home, so I was trying to convince my mother to keep our fish in the 20 gallon and do a fishless cycle in the 75 gallon. She wouldn't hear of it because its "pointless to do a fishless cycle". I asked on here about what to do and members here recommended since the fish are so big and the tank is so small to divide them up between to two tanks. My mother wouldn't hear of that either. :crazy:

To end the "dispute" I said we could go to our local fish store and ask them since they have always been very knowledgeable about things and everything they've ever suggested to us has always worked. We usually go around lunch time but had to wait to go to closer to dinner time this time. The three people we usually talk to and whose advice we trust weren't there and the only person working was a kid (maybe 20) who must've been fairly new since we'd never seen him before. We asked him and he told us the only way to cycle a tank was by using mature filter media or by putting fish in. He didn't even mention using pure ammonia and looked at me like some pshyco-ding-bat when I was trying to explain a fishless cycle. He offered no mature media that they might have had on hand so my mother decided to buy fish to put in the 75 gal and leave our old fish int he 20 gal for the time being. :shout:

Our 20 gallon currently has:
3 Silver Dollars (1 small plate sized, others approx 3-4-inch)
1 Black Skirt Tetra (approx 2-inch)
1 Brown Knife Fish (approx 4-5 inch)
2 Angel Fish (approx 3-inch)
1 Marble Hatchetfish (approx 1 inch)
1 Sailfin Pleco (approx 3 inches)

Our 75 gallon currently has:
5 Zebra Danios


I have some questions about this set-up and fish-in cycling for anyone that might be able to help.

1. I haven't lost a single fish in the 20 gallon yet. They all appear happy and healthy. I'm maintining the water by doing partial water changes on the tank every day. Thus far, I've been able to keep the ammonia in the 0.5 to 1.0 range. I've recorded no nitrite readings. I've been doing good on this tank so far, but how many gallons of water on this tank do you think I should change out per day?

2. I've already lost two Danios out of the 75 gallon. We started with 7. For the past two days I haven't done any water changes in the 75 since the ammonia levels were so low. During the time that I haven't changed the water the ammonia has not increased, but it hasn't decreased either. I haven't recorded any nirtite readings here either. I know cycling can take a long time....but I can't even see any progress in this tank whatsoever. At least in the 20 gal I can see things happinging. What can I do? Is there anything I can do to push it along or am I just impatient?
 
As some of you may have read, due to unforseen circumstances, we had to completely drain, throw away the gravel, and replace the filter media on our 75 gallon tank due to a bacteria infestation. We took our old fish out of the 75 gallon and placed them in a 20 gallon hospital tank which also has completely replaced filter media. In essence, I have two tanks that are uncycled.

I'm still living at home, so I was trying to convince my mother to keep our fish in the 20 gallon and do a fishless cycle in the 75 gallon. She wouldn't hear of it because its "pointless to do a fishless cycle". I asked on here about what to do and members here recommended since the fish are so big and the tank is so small to divide them up between to two tanks. My mother wouldn't hear of that either. :crazy:

To end the "dispute" I said we could go to our local fish store and ask them since they have always been very knowledgeable about things and everything they've ever suggested to us has always worked. We usually go around lunch time but had to wait to go to closer to dinner time this time. The three people we usually talk to and whose advice we trust weren't there and the only person working was a kid (maybe 20) who must've been fairly new since we'd never seen him before. We asked him and he told us the only way to cycle a tank was by using mature filter media or by putting fish in. He didn't even mention using pure ammonia and looked at me like some pshyco-ding-bat when I was trying to explain a fishless cycle. He offered no mature media that they might have had on hand so my mother decided to buy fish to put in the 75 gal and leave our old fish int he 20 gal for the time being. :shout:

Our 20 gallon currently has:
3 Silver Dollars (1 small plate sized, others approx 3-4-inch)
1 Black Skirt Tetra (approx 2-inch)
1 Brown Knife Fish (approx 4-5 inch)
2 Angel Fish (approx 3-inch)
1 Marble Hatchetfish (approx 1 inch)
1 Sailfin Pleco (approx 3 inches)

Our 75 gallon currently has:
5 Zebra Danios


I have some questions about this set-up and fish-in cycling for anyone that might be able to help.

1. I haven't lost a single fish in the 20 gallon yet. They all appear happy and healthy. I'm maintining the water by doing partial water changes on the tank every day. Thus far, I've been able to keep the ammonia in the 0.5 to 1.0 range. I've recorded no nitrite readings. I've been doing good on this tank so far, but how many gallons of water on this tank do you think I should change out per day?

2. I've already lost two Danios out of the 75 gallon. We started with 7. For the past two days I haven't done any water changes in the 75 since the ammonia levels were so low. During the time that I haven't changed the water the ammonia has not increased, but it hasn't decreased either. I haven't recorded any nirtite readings here either. I know cycling can take a long time....but I can't even see any progress in this tank whatsoever. At least in the 20 gal I can see things happinging. What can I do? Is there anything I can do to push it along or am I just impatient?

doing a fish in cycle will not show much results for awhile its not like using ammonia and takes like a week your talking this method will take upto 6 weeks... and all those fish in that 20 gal tank for that long i dont see them lasting a week tio be honest. to push it along faster you can go to your LFS and get some stuff called cycle and its suppose to cut the time in half for cycling a tank.
 
I would personaly move your fish so a few are left in the 20g, and the rest in the 75g. I say this as the ammonia will raise very quickly in the 20g, in comparison to the 75g. Keep doing the water changes on each tank, to keep ammonia down. The general consensus is that the ammonia has to be below 0.25 to prevent long-tearm damage to your fish. levels between .5 and 1 will almost cirtainly caurse your fish an early death. If you have to keep most of your fish in the 20g, steap up the water changes either in volume or regularity, or preferably both, to keep ammonia below .25.
I know that there will be more work for water changes in the 75g, but the ammonia will not raise as fast in there. That makes conditions far easier on the fish, reducing their chances of becoming ill.
HTH
rabbut
 
If I can convince my mother of separating the fish do you have any suggestions as to which fish would be best to move to the 75 and which would be best to leave in the 20 gal? I have my own ideas of who I would move, I just want to make sure they concur somewhat with everyone elses.
 
I'd move the bigger ones into the 75 gallon. I'd be a little worried about aggression flaring eventually with so many large fish in a small tank.

Oh and it's pretty much common consensus that products like "cycle" do not work.
 
I woukld most deffinetley put your angels in the 75 due to the fact they arent very hardy and you can probably manage your 75 gal tanks ammonia levels better than the 20 gal tanks. As for the other fish id research them and see which ones arent real hardy and move them but you dont want to many fish in the 75 gal or it will defeat the purpose.
 
Whereabouts are you? Maybe somebody on here can donate you some mature media or, even better, a cycled filter. I know that if you were round the corner from me I'd be willing to help.
 

Most reactions

Back
Top