Davekyn said:
TI’ve been worried about water changes as I thought it might upset the balance of my Bio system. I originally purchased the internal bio system so I would not have to do water changes. Having said that, I did change the water occasionally (only 10%) and found it was helping. Also I get worried about changing to much water because of the temps ect… But guess I could doing it very slowly as I have been doing in my smaller tank.
There is so much to consider to get things right. Anyways they all sound like very interesting ideas and I’m sure one of them is for me. Yes I agree, I’d like to give the chemical treatment a miss as all the fish are so darn happy as it is.
I was thinking of adding another filter specifically for clarity. Maybe when I remove the bulk of décor for gravel cleaning I’ll try the boiling method also.
Purr gave excellent advice on the boiling. That most likely is what it is, and then it should have VERY little in the next month. Also, about the other filter. I know you have a 70 gallon tank right now, what is your gph of your current filter, and what gallon rating is it for? You might need a little extra, or you might be good. Even though filters are sold as "never do water changes", you always will have to. Unfortunately, to get the best water, both in clarity, and chemicals/minerals, you need fresh water on occasion. Some tanks can go 3 weeks without changes, some need it twice a week. It all depends on planted/unplanted, heavily stocked, lightly stocked, type of fish, etc.
You shouldnt have to change yours that often, but a 20-30% change every 10 days-couple weeks would probably be a good start for you
So, homework- find your rating for your filter, and we can tell ya if you should/can get another
We are Filterphobics here, so the answer will probably be, yes.