by Kenshin_Himura on Wed Mar 28, 2007 12:28 am
yeah, growing up with fish they have a tendancy to co-exist with other species better, but no guarantees. Having two Oscars with those two fish will be pushing your tolerance for pain even in a 75, but it is doable with dedicated maintenance schedule. 55 would be like pulling your teeth without anything for pain and an abcess at the same time. One O would be much easier to handle in either situation, and would be just as happy alone if that is what it knows. Are you keeping the 55 when you get the 75 ... it gives you more options ...
Plecos produce a decent amount of waste and grow quite big, can get around 24" in length (we have a local place that has quite a few 12-18"). Add a Bichir that gets 12" in length, plus two Oscars of minimum 12" in length. That is 60" of massive fish and bio-load. Not the same as 60 tetras or 60 mollies which could easily be maintained in a 75, and not too hard in a 55. In fact, I don't think 60 mollies even equals one full grown Oscar.
When healthy and kept in clean water, an Oscar will grow 1-2" a month. If you buy them at 2", that gives you two to four months before they get large enough where they start to get territorial, and that issue gets worse as nitrates go up. Plecos can also be territorial when they get large.
I had a friend that had two Os in a 55, he overfed them a bit because he couldn't resist the begging, but was doing 50% water changes two to three times a week at around 6" SL until he gave them away and still barely kept the water livable but not as low as he wished. Feeding less and a better digested food would have helped, but only so much.
Again, anything is possible if you are willing to change enough water, with enough frequency. Doing water quality tests would be the only way to know that.
Depending on your living situation/floor strength, space, and budget, you may be able to get a bigger tank than a 75. Shop around for tank only prices (you'd be amazed how cheap some are), used tanks on various sites/papers (verify they don't leak before you take it!!!), etc. Build your own stand. If you are getting a tank with wet/dry pre-drilled holes, check LFS for used systems and save a buck. Go extra light on gravel or use none at all ... it makes it easier to keep clean.
I have learned to buy for what you have, not for what you think you will have and also it is better to be understocked than at or above the limit. I would wait on the Os until you have the bigger tank. Os will always be for sale, but I can understand wanting them now. If you want an O bad enough right now, I would definitely go with just one.
I am curious, have you decided what color you want?