Hello. We recently started a tank, and I have a few questions. The tank is 29 gallons. 1. When we first set the tank up (before adding fish), the PH was too high, so we used a product called PH Proper 7.0. The PH was fine after that (around 7.0). We added fish. After doing a 25% water change, the PH was too low (around 6.4). The PH Proper 7.0 just never seems to bring it up. I added aquarium salt, and the PH still did not go up. I am now trying a liquid PH increaser, and it appears to be going up gradually. My question is about aquarium salt. The container says to use 1 tablespoon for every 10 gallons. For 29 gallons, I'm using three tablespoons. When I do a 25% water change, is it ok to use three tablespoons of aquarium salt again, or should I use 25% of three tablespoons? 2. The rule of thumb is 1 gallon for every inch of fish. Does this rule apply to the current size of the fish or the maximum size of the fish? The reason I ask is because one of the fish in my tank is a clown loach. It is only about three inches right now, but I believe they get a lot bigger. My plan is to get a bigger tank for the clown loach when it starts getting bigger (so I plan to follow the 1 gallon per inch of fish rule). Is this an ok way to do this? 3. When people go on vacation for a week, how do they feed their fish? I've seen those white shells that float on top of the tank, and I've also seem automatic feeders on store shelves. Which works better? I plan to add an algae eater eventually. If I do not have enough algae in my tank while I'm on vacation, how will it eat for a week? I don't think algae wafers fit in automatic feeders. Or do they? 4. I have a power filter close to the middle of the tank but more to the left. I have a treasure chest that is hooked up to an air pump, and it blows bubbles. Does this create adequate water circulation? The water appears to be circulating, but my air pump has a place for two connectors...and I only have one thing connected to it (the treasure chest). 5. What happens during a power outage? I remember a few years ago, there were places that did not have power for a few days. What type of safeguards are there to ensure that the tank stays heated during a power outage? (I live in Buffalo, NY, so without the heater the water would get pretty cold in the winter). 6. Not a question, but here is what I have in my 29 gallon tank: 1 - clown loach 1 - cat fish (the kind with the really long whiskers - I think it starts with a "p"). 3 - dwarf gouramis 2 - albino rainbow sharks I plan to add an algae eater later, and that's about all for that tank (don't want it to be too crowded). We've had the cat fish for over three weeks now.