Where should an aquarium be kept?
Nowhere: an aquarium is fancy vastu, not Vedic vastu. Keeping any creature captive is not right, and water kept impure for a long time disturbs the water element further; just as being shut in a 6 x 6 room for life with food provided would feel wrong, it is wrong to imprison living beings. An aquarium does not remove vastu dosh, it creates one, and no one's wealth has grown from keeping one.
Related questions
A client's location shows coordinates. What do I do with them?
Copy them and paste them into the Google Earth search bar, which takes you to the place. Then draw a straight line along a wall of the building to get the degree. A degree taken from the centre is wrong; the centre only tells you which direction a room is in.
A gallery or balcony outside a room was open at first and later covered; should it be included in the map?
Include it in both cases, covered or not. You go there and move around in it, so it counts as part of the house.
A regular plot has small strips of land left open at the side and the front. Do we leave them out or zone the complete plot?
Zone the complete plot. Almost the whole plot is in use and even the small strips are being used, so the full plot is taken for zoning and for the degree.
Are the water supply lines coming into the house counted as water bodies?
No. Water lines reach every zone anyway through washrooms and taps, and lines inside the ground do not have much effect. Only dirty water lines matter, which is why they should run clockwise.
Can the Google Earth method be done on a phone?
Google Earth with the ruler works only on a laptop or PC. On a phone you can use a photo editing app instead: take the chakra image in PNG form, ask the client for a photo of the map and overlay the chakra on it, which needs some photo editing skill.
Can we join all the corners of an irregular plot into a square and take its diagonals as the centre?
No. When part of the plot is cut, the true centre shifts, yet the square drawn through the corners stays the same, so its diagonals give a wrong centre. Diagonals were used in the earlier zoning class only because that map was regular, with the open parking area at the side.