50 gallon Brackish set up/ Violet Goby Archer fish?

  • We are currently upgrading MFK. thanks! -neo

Liz Sagara

Feeder Fish
MFK Member
Jan 13, 2011
714
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Texas
Hello, I'm new to Monsterfishkeepers

I have a few questions.:help2:

My equipment:
1. Fifty gallon tank measuring 48" long, 19" high, and 13" wide
2. One HOB filter meant for 45 gallons and one internal filter meant for 30 gallons
3. One Heater meant for 50 gallons
4. One Hydrometer
5. Two Floating glass thermometers (put on opposite ends to measure heat distribution in the tank)
6. Two full hoods with incandescent lighting in them

My decor:
1. PH neutral sand (My water hardness is 8.0-8.2 on average)
2. 2 large green plastic plants that are tall enough to drape across the top of the water half way and several other smaller plastic plants
3. Several mismatched decorations (caves bridges etc.)

My Idea:
I would very much like to transform this tank into a fifty gallon brackish environment.
1. I would like to have one Violet Goby in it
2. In addition I would like to have three archer fish in it

Additional info:
1. The tank has been up and running for about four weeks now and is cycled but is cycled as a fresh water tank.
2. I would like it to look as natural as possible


I would like to know if this is a good idea. This is my first large brackish tank. I have maintained a fiddler crab and a 30 gallon Green spotted puffer tank that are also brackish.

My plan:
Since the tank is already cycled as a freshwater tank and the fish I'll be getting are commonly housed in freshwater at the store, I thought I would add all of the Archerfish at once and increase the salinity slowly over a week or two to 1.005-1.010. Then I will purchase the violet Goby and put him in my spare 30 gallon breeder tub and increase his salinity over time and then add him to the 50 gallon tank. (this is too keep from adding too many fish at once and I would like to add the archers all at once simply because I don't want to add one and then have it claim the entire tank and not allow the other two to coexist with it.)

Maintenance plan:
1. 25% water change weekly
2. Once a month wash one of filter pads with used aquarium water and them wash the other pad the next month to keep from wiping out too much of the bacteria at once
3. Yearly wash all equipment with used water

Does this sound good? Suggestions? Instructions? Constructive criticism?
 
sounds like a plan, although i would look at filtration seriously brackish needs to have a high turn over of liters an hour through good media, look at turning the tank over at least 7 times an hour
 
75 gallons of filtration wouldn't do that? What do you suggest then. Canister filter systems are not an option with my budget plan. But I test weekly as well as every other day for my more sensitive fish and record the data on a spread sheet. WOuld you suggest finding 2 100 gallon filters for this tank? I forget how to calculate turnover it says on the box though when you get it. Would they be okay as lightly stocked as it would be since I'm buying them no larger than 2 inches a peice possibly up to five for the Violet Goby? So that I could buy one filter and seed it before placing it in the tank and then do the other?
 
An AC 110 would give you all the filtration you need. It turns 500 gph (IIRC.)

I would do water changes more often. 40-50% per week is a good general rule. I do this even if NitrAtes are not high. Clean, fresh water makes fish happy. This way, if you ever run into a week where you can't do the water change, the fish will still be happy during that time.

I would also do maintenance on the filter more often. Bang out the sponges/filter pads really well at least once every two weeks.

Like I said before, ditch the pH altering sand, it will just cause more problems than it's worth. Use your tap water, treated with a dechlorinating chemical, and add salt. Let it "cure" overnight in a tub/bin/trashcan (whatever.) Brackish/marine systems naturally have a high pH/alkalinity. Using the sand will just cause swings in your pH which will due unnecessary harm and stress to your fish.

The two filters you have, barely turn over 3x the tank's capacity, which is much less than what you need in this situation. Just because it is "labeled" as being for 45 and 30 gallon tanks, does not mean it is actually sufficient for these size tanks. GPH is the only way to judge whether or not you have enough filtration.
 
it should say on the filter pump how many liters or gallons an hour the pump does, my tank is 350 liters i have 2 canister filters one does 1000 liters an hour the other is 1500 also an inernal at 1000, 3500 total turn over an hour, 350 into 3500 goes 10 times, tank is turned over around 10 times in an hour.
 
Laticauda;4793943; said:
Like I said before, ditch the pH altering sand, it will just cause more problems than it's worth.

It's PH Neutral... meaning it doesn't affect the PH says so on the bag and I tested this before I ever added it. my PH was 8.1 before the sand and it's 8.1 after the sand.

I will definitely do more water changes. I do water changes on Friday so I'm answering these between water changes! HA HA... my comp is sort of damp.... not good.

The HOB filters 200 gph and the internal does 145 gph so 345... alright I'm upgrading the filters. I'll put the 30 gallon internal on my 10 gallon fiddler crab tank so I can drop the water level for more land. Because they just need to be able to get in and get wet yes? They don't swim...

For the FIlter: This one http://i196.photobucket.com/albums/aa15/Lukestimp/AC110Mod001.jpg
 
If those are the gph, then that would be sufficient for a 50 gallon. Total would be 545 gph and that is just a smidge over 10x.

I do like the aquaclear, though, since there is so much room for extra biomedia, versus traditional HOB filters. I've never used an internal filter on a tank before, so can't speak as to how well they work/would work.

Okay, that's good to hear about the sand. I assumed you meant the sand makes the water a neutral pH (like Neutral Regulator by Seachem.)

Sounds like you are off to a great start! Petsmart had AC's on sale after Christmas, but if you could find one used on Craigslist that would be good too (and cheaper.)
 
Alright I went to the fish store and I bought a Marineland Bio-wheel Power filter Penguin 350 to use in addition to my other HOB filter so that gives me a total of 550 gallons of filtration! I feel better about that now. hopefully they are a good brand. I've liked my other Marineland filter so it should be good. I also got another test kit because mine ran out.

Does anyone have any good DIY tank extensions that I can put on top of the one I've got to be able to feed my archers above the water line? or a place I can buy one?
 
Just use a sponge filter! They are an amazing way to reduce bioload. They're ugly but just hide it behind a rock. The bigger the better.
 
spitz006;4825021; said:
Just use a sponge filter! They are an amazing way to reduce bioload. They're ugly but just hide it behind a rock. The bigger the better.


Yeeeaaaah.... no. I don't think so.
 
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