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Discussion Starter · #1 ·
Hi everyone!

I currently have a 45 gallon tank setup but was given a 75 gallon tank by a friend.

I'd like to migrate the inhabitants of my 45 gallon to the 75 but I do not have the ability to have both tanks running at the same time. I currently use crushed coral as a substrate and would like to use sand in the new tank.

Would the cycle be to harsh for my mostly juvenile fish?

I'm thinking they "should" be ok.

What would be recommended?

Bucket the current tank water and use that in the new tank, then top up?

Would my current Fluval 305 canister and Aquaclear 70 HOB be sufficient for filtration?

I'm stocked with

5 Kenyi
4 mpanga
2 RR Zebras
1 PW Zebra
2 Auratus
2 Pearlmuts
3 Syno cats
 

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I would set up the 75G tank like you want with sand (Pool Filter Sand works best), decorations, and so on. Then fill it up with tap water of the right temperature and ad the required amount of dechlorinator. Then transfer the filters from the 45G to the 75G. Make sure everything runs as expected. Then transfer the fish.

You'll loose some bacteria from the old substrate, but that shouldn't even be measurable as ammonia spike. Most of the bacteria will be in the filters, and get transferred. Transferring water only transfers waste. Better to start with fresh water and let your filters deal only with the new fish poop in the new tank :wink:

If the 75G is going in the space of the 45G, you can break down the 45G first, and keep the fish in a plastic tote or buckets. They'll be fine for the few hours it might take to get the new tank perfect. Covering the tote with a towel or some such thing will reduce stress and prevent jumpers. An air pump would be good, but is not necessary if you don't have one. The bacteria in the filters wouldl also be fine during that period.
 

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Discussion Starter · #3 ·
fmueller said:
I would set up the 75G tank like you want with sand (Pool Filter Sand works best), decorations, and so on. Then fill it up with tap water of the right temperature and ad the required amount of dechlorinator. Then transfer the filters from the 45G to the 75G. Make sure everything runs as expected.
Thank you for the reply!!

Would those 2 filters mentioned (Fluval 305 and Aquaclear 70) be sufficient for a 75 gallon tank? Or should I add another 305 (see one for sale near by cheap!)
 

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I don't use HOB filters, because I don't think they do much other than pump around water. I also don't own a Fluval, but I have an Eheim 2217 on my 75G, which I am very happy with. The Fluval 305 is about the same size as the Eheim 2217 (6.6L media volume compared to 6.0L). The Eheim has a slightly stronger pump - 265gph compared to 185gph in the Fluval (data from Petsolutions), but that doesn't mean much, and you also have the Aquaclear.

In short, your filtration should be easily good enough for a 75G, but then you can never overfilter :thumb:
 
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