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- Aug 3, 2025
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- What state or country do you live in
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I've been thinking about upgrading my 20 gallon long to a 40 gallon. This could be a little tricky since I plan setting up the new tank in the same spot. Here is my plan.
I was going to buy some 5 gallon buckets to drain the existing tank water into those buckets.
I was either going to mix-up some new water or purchase it from an LFS. I haven't decided on which one.
Place my live rock, and corals into the buckets with water.
Catch the fish, and inverts before I place them into buckets with lids.
Swap the tanks and stands
Add fresh sand and top off with some of the sand from the old tank. I'm only going to use a little from the top to avoid any issues.
Add the rocks, corals, and then the fish.
Here are my current inhabitants.
2 ocellaris clowns
1 Yellow-head Jawfish
1 Bicolor Blenny
1 Emerald Crab
Assortment of snails and hermit crabs.
Mixture of LPS and Soft corals.
I'm using a Nicrew 32 watts for my lights. I might have to upgrade here with the extra space.
My filter is a Seachem Tidal 35. I think I should be fine for now, but if I want to add anymore fish. I'll need to upgrade.
I'm using a Fluval 100 watt heater.
I'm using an AI Nero 3 for my wavemaker. I also have a Voyager 1000 wavemaker that I can use as well.
How much sand should I buy? I can always arrange the sand deeper in an area where I think my jawfish will build his home, but jawfish being jawfish, it'll be where it feels more comfortable.
Does anyone see anything I'm not thinking about?
What are some things I should look out for?
Does anyone have any suggestions?
Thank you!
I was going to buy some 5 gallon buckets to drain the existing tank water into those buckets.
I was either going to mix-up some new water or purchase it from an LFS. I haven't decided on which one.
Place my live rock, and corals into the buckets with water.
Catch the fish, and inverts before I place them into buckets with lids.
Swap the tanks and stands
Add fresh sand and top off with some of the sand from the old tank. I'm only going to use a little from the top to avoid any issues.
Add the rocks, corals, and then the fish.
Here are my current inhabitants.
2 ocellaris clowns
1 Yellow-head Jawfish
1 Bicolor Blenny
1 Emerald Crab
Assortment of snails and hermit crabs.
Mixture of LPS and Soft corals.
I'm using a Nicrew 32 watts for my lights. I might have to upgrade here with the extra space.
My filter is a Seachem Tidal 35. I think I should be fine for now, but if I want to add anymore fish. I'll need to upgrade.
I'm using a Fluval 100 watt heater.
I'm using an AI Nero 3 for my wavemaker. I also have a Voyager 1000 wavemaker that I can use as well.
How much sand should I buy? I can always arrange the sand deeper in an area where I think my jawfish will build his home, but jawfish being jawfish, it'll be where it feels more comfortable.
Does anyone see anything I'm not thinking about?
What are some things I should look out for?
Does anyone have any suggestions?
Thank you!

If it's clean – re-use all of it. If not, sand is cheap and cleaning it can be time- and water-consuming – just get new sand. (If there's something special about your sand that you wan't to keep it, at least it's a small amount to clean.)